Once when Gerald studied in the first year at school, his teacher gave the class the following homework. She offered the students a string consisting of n small Latin letters; the task was to learn the way the letters that the string contains are written. However, as Gerald is too lazy, he has no desire whatsoever to learn those letters. That's why he decided to lose some part of the string (not necessarily a connected part). The lost part can consist of any number of segments of any length, at any distance from each other. However, Gerald knows that if he loses more than k characters, it will be very suspicious. 

Find the least number of distinct characters that can remain in the string after no more than k characters are deleted. You also have to find any possible way to delete the characters.

Input

The first input data line contains a string whose length is equal to n (1 ≤ n ≤ 105). The string consists of lowercase Latin letters. The second line contains the number k (0 ≤ k ≤ 105).

Output

Print on the first line the only number m — the least possible number of different characters that could remain in the given string after it loses no more than k characters.

Print on the second line the string that Gerald can get after some characters are lost. The string should have exactly m distinct characters. The final string should be the subsequence of the initial string. If Gerald can get several different strings with exactly m distinct characters, print any of them.

Examples

Input

aaaaa
4


Output

1
aaaaa


Input

abacaba
4


Output

1
aaaa


Input

abcdefgh
10


Output

0

Note

In the first sample the string consists of five identical letters but you are only allowed to delete 4 of them so that there was at least one letter left. Thus, the right answer is 1 and any string consisting of characters "a" from 1 to 5 in length.

In the second sample you are allowed to delete 4 characters. You cannot delete all the characters, because the string has length equal to 7. However, you can delete all characters apart from "a" (as they are no more than four), which will result in the "aaaa" string.

In the third sample you are given a line whose length is equal to 8, and k = 10, so that the whole line can be deleted. The correct answer is 0 and an empty string.


import java.awt.Point;
import java.io.*;
import java.math.BigInteger;
import java.util.*;
import static java.lang.Math.*;

public class ProblemC_79 {
    
    final boolean ONLINE_JUDGE = System.getProperty("ONLINE_JUDGE")!=null;
    BufferedReader in;
    PrintWriter out;
    StringTokenizer tok = new StringTokenizer("");
    
    void init() throws FileNotFoundException{
        if (ONLINE_JUDGE){
            in = new BufferedReader(new InputStreamReader(System.in));
            out = new PrintWriter(System.out);
        }else{
            in = new BufferedReader(new FileReader("input.txt"));
            out = new PrintWriter("output.txt");
        }
    }
    
    String readString() throws IOException{
        while(!tok.hasMoreTokens()){
            tok = new StringTokenizer(in.readLine());
        }
        return tok.nextToken();
    }
    
    int readInt() throws IOException{
        return Integer.parseInt(readString());
    }
    
    long readLong() throws IOException{
        return Long.parseLong(readString());
    }
    
    double readDouble() throws IOException{
        return Double.parseDouble(readString());
    }
    
    public static void main(String[] args){
        new ProblemC_79().run();
    }
    
    public void run(){
        try{
            long t1 = System.currentTimeMillis();
            init();
            solve();
            out.close();
            long t2 = System.currentTimeMillis();
            System.err.println("Time = "+(t2-t1));
        }catch (Exception e){
            e.printStackTrace(System.err);
            System.exit(-1);
        }
    }
    
    void solve() throws IOException{
        char[] c = readString().toCharArray();
        int k = readInt();
        HashMap<Character, Integer> map = new HashMap<Character, Integer>();
        for (int i = 0; i < c.length; i++){
            if (!map.containsKey(c[i])) map.put(c[i], 0);
            map.put(c[i], (map.get(c[i]) + 1));
        }
        HashMap<Integer, Character> map2 = new HashMap<Integer, Character>();
        HashMap<Character, Integer> map3 = new HashMap<Character, Integer>();
        for (char ch: map.keySet()){
            map2.put(map2.size(), ch);
            map3.put(ch, map3.size());
        }
        int len = map.size();
        Point[] d = new Point[len];
        int ii = 0;
        for (char ch: map.keySet()){
            d[ii++] = new Point(ch - 'a', map.get(ch));
        }
        Arrays.sort(d, new Comparator<Point>() {

            @Override
            public int compare(Point p1, Point p2) {
                return p1.y - p2.y;
            }
            
        });
        ii = 0;
        int count = 0;
        for (int i = 0; i < len; i++){
            if (count + d[i].y <= k){
                count += d[i].y;
                ii++;
            }
        }
        out.println(len - ii);
        for (int i = 0; i < c.length; i++){
            for (int j = ii; j < len; j++){
                if (d[j].x == c[i] - 'a') out.print(c[i]);
            }
        }
//      boolean[] minU = new boolean[map.size()];
//      int n = (1 << len);
////        boolean[] used = new boolean[len];
////        Arrays.fill(used, true);
//      short[] d = new short[n];
//      d[n-1] = 0;
//      for (int i = n; i >= 0; i--){
//          for (int j = 0; j < len; j++){
//              if ((i & (1 << j)) != 0){
//                  d[i ^ (1 << j)] = (short) (d[i] + map.get(map2.get(j)));
//              }
//          }
////            Arrays.fill(used, true);
////            for (int j = 0; j < len; j++){
////                if ((i & (1 << j)) == 0){
////                    count += map.get(map2.get(j)); 
////                    m--;
////                    used[j] = false;
////                }
////            }
////            if (count <= k){
////                if (min > m){
////                    min = m;
////                    for (int j = 0; j < len; j++) minU = Arrays.copyOf(used, used.length);
////                }
////            }
//      }
//      Point min = new Point(Integer.MAX_VALUE, n - 1);
//      for (int i = 0; i < n; i++){
//          if (d[i] <= k){
//              int x = 0;
//              for (int j = 0; j < len; j++){
//                  if ((i & (1 << j)) != 0) x++;
//              }
//              min.x = x;
//              min.y = i;
//          }
//      }
//      out.println(min.x);
//      for (int i = 0; i < c.length; i++){
////            if (minU[map3.get(c[i])]) out.print(c[i]);
//          if ((min.y & (1 << map3.get(c[i]))) != 0) out.print(c[i]);
//      }
    }
    
    static int[][] step8 = {{-1, 0}, {1, 0}, {0, -1}, {0, 1}, {-1, -1}, {1, -1}, {-1, 1}, {1, 1}};
    
    static int[][] stepKnight = {{-2, -1}, {-2, 1}, {-1, -2}, {-1, 2}, {1, -2}, {1, 2}, {2, -1}, {2, 1}};
    
    static long gcd(long a, long b){
        if (a == 0) return b;
        return gcd(b % a, a);
    }
    
    static long lcm(long a, long b){
        return a / gcd(a, b)*b;
    }

    static long[] gcdPlus(long a, long b){
        long[] d = new long[3];
        if (a == 0){
            d[0] = b;
            d[1] = 0;
            d[2] = 1;
        }else{
            d = gcdPlus(b % a, a);
            long r = d[1];
            d[1] = d[2] - b/a*d[1];
            d[2] = r;
        }
        return d;
    }
    
    static long binpow(long a, int n){
        if (n == 0) return 1;
        if ((n & 1) == 0){
            long b = binpow(a, n/2);
            return b*b;
        }else return binpow(a, n - 1)*a;
    }
    
    static long binpowmod(long a, int n, long m){
        if (m == 1) return 0;
        if (n == 0) return 1;
        if ((n & 1) == 0){
            long b = binpowmod(a, n/2, m);
            return (b*b) % m;
        }else return binpowmod(a, n - 1, m)*a % m;
    }
    
    static long phi(long n){
        int[] p = Sieve((int)ceil(sqrt(n)) + 2);
        long phi = 1;
        for (int i = 0; i < p.length; i++){
            long x = 1;
            while (n % p[i] == 0){
                n /= p[i];
                x *= p[i];
            }
            phi *= x - x/p[i];
        }
        if (n != 1) phi *= n - 1;
        return phi;
    }
    
    static long f(long n, int x, int k){ //Кол-во десятичных чисел (включая 0), содержащих в себе цифры от 0 до k-1
        if (n == 0) return 1;
        long b = binpow(10, x - 1);
        long c = n / b;
        return (c < k? c: k)*binpow(k, x - 1) + (c < k? 1: 0)*f(n % b, x - 1, k);
    }
    
    static long fib(int n){
        if (n == 0) return 0;
        if ((n & 1) == 0){
            long f1 = fib(n/2 - 1);
            long f2 = fib(n/2 + 1);
            return f2*f2 - f1*f1;
        }else{
            long f1 = fib(n/2);
            long f2 = fib(n/2 + 1);
            return f1*f1 + f2*f2;
        }
    }
    
    static BigInteger BigFib(int n){
        if (n == 0) return BigInteger.ZERO;
        if ((n & 1) == 0){
            BigInteger f1 = BigFib(n/2 - 1);
            f1 = f1.multiply(f1);
            BigInteger f2 = BigFib(n/2 + 1);
            f2 = f2.multiply(f2);
            return f2.subtract(f1);
        }else{
            BigInteger f1 = BigFib(n/2);
            f1 = f1.multiply(f1);
            BigInteger f2 = BigFib(n/2 + 1);
            f2 = f2.multiply(f2);
            return f2.add(f1);
        }
    }
    
    static public class PointD{
        
        double x, y;
        
        public PointD(double x, double y){
            this.x = x;
            this.y = y;
        }
    }
    
    static double d(Point p1, Point p2){
        return sqrt(d2(p1, p2));
    }
    
    static public double d(PointD p1, PointD p2){
        return sqrt(d2(p1, p2));
    }
    
    static double d2(Point p1, Point p2){
        return (p1.x - p2.x) * (p1.x - p2.x) + (p1.y - p2.y) * (p1.y - p2.y);
    }
    
    static public double d2(PointD p1, PointD p2){
        return (p1.x - p2.x) * (p1.x - p2.x) + (p1.y - p2.y) * (p1.y - p2.y);
    }
    
    static boolean IsProbablyPrime(long n){
        if (n == 1) return false;
        if ((n & 1) == 0) return false;
        for (int j = 3; j < sqrt(n) + 1; j += 2){
            if (n % j == 0) return false;
        }
        return true;
    }

    static int[] Sieve(int n){
        boolean[] b = new boolean[n+1];
        Arrays.fill(b, true);
        b[0] = false;
        b[1] = false;
        long nLong = n;
        int j=0;
        for (int i = 1; i <= n; i++) {
            if (b[i]){
                j++;
                if (((long)i)*i <= nLong) {
                    for (int k = i*i; k <= n; k += i) {
                        b[k] = false;
                    }
                }
            }
        }
        int[] p = new int[j];
        Arrays.fill(p, 0);
        j=0;
        for (int i = 2; i <= n; i++) {
            if (b[i]){
                p[j]=i;
                j++;
            }
        }
        return p;
    }
    
    static int[][] Palindromes(String s){
        char[] c = s.toCharArray();
        int n = c.length;
        int[][] d = new int[2][n];
        int l = 0, r = -1;
        for (int i = 0; i < n; i++){
            int j = (i > r? 0: min(d[0][l+r-i+1], r-i+1)) + 1;
            for (; i - j >= 0 && i + j - 1< n && c[i-j] == c[i+j-1]; j++);
            d[0][i] = --j;
            if (i + d[0][i] - 1 > r){
                r = i + d[0][i] - 1;
                l = i - d[0][i];
            }
        }
        l = 0;
        r = -1;
        for (int i = 0; i < n; i++){
            int j = (i > r? 0: min(d[1][l+r-i], r-i)) + 1;
            for (; i - j >= 0 && i + j < n && c[i-j] == c[i+j]; j++);
            d[1][i] = --j;
            if (i + d[1][i] > r){
                r = i + d[1][i];
                l = i - d[1][i];
            }
        }
        return d;
    }
    
    static public class Permutation {
        
        int[] a;
        int n;
        
        public Permutation(int n){
            this.n=n;
            a=new int[n];
            for (int i=0; i<n; i++){
                a[i]=i;
            }
        }
        
        public boolean nextPermutation(){ //Пишется с do{}while(nextPermutation(a));
            int i=n-1;
            for (i=n-2; i>=0; i--){
                if (a[i]<a[i+1]){
                    break;
                }
            }
            if (i==-1){
                return false;
            }
            int jMin=i+1;
            for (int j=n-1; j>i; j--){
                if (a[i]<a[j]&&a[j]<a[jMin]){
                    jMin=j;
                }
            }
            swap(i, jMin);
            for (int j=1; j<=(n-i)/2; j++){
                swap(i+j, n-j);
            }
            return true;
        }
        
        
        public int get(int i){
            return a[i];
        }
        
        void swap(int i, int j){
            int r=a[i];
            a[i]=a[j];
            a[j]=r;
        }
    }
    
    static public class Fraction implements Comparable<Fraction>, Cloneable{
        
        public final Fraction FRACTION_ZERO = new Fraction();
        public final Fraction FRACTION_ONE = new Fraction(1);
        public long numerator = 0;
        public long denominator = 1;
        
        public Fraction(){
            numerator = 0;
            denominator = 1;
        }
        
        public Fraction(long numerator){
            this.numerator = numerator;
            denominator = 1;
        }
        
        public Fraction(long numerator, long denominator){
            this.numerator = numerator;
            this.denominator = denominator;
            Cancellation();
        }
        
        public Fraction(double numerator, double denominator, int accuracy){
            this.numerator = (long)(numerator*pow(10,accuracy));
            this.denominator = (long)(denominator*pow(10,accuracy));
            Cancellation();
        }
        
        public Fraction(String s){
            if (s.charAt(0) == '-'){
                denominator = -1;
                s = s.substring(1);
            }
            if (s.indexOf("/") != -1){
                denominator *= Integer.parseInt(s.substring(s.indexOf("/") + 1));
            }
            if (s.indexOf(" ") != -1){
                numerator = Integer.parseInt(s.substring(0, s.indexOf(" "))) * abs(denominator) + Integer.parseInt(s.substring(s.indexOf(" ") + 1, s.indexOf("/")));
            }else{
                if (s.indexOf("/") != -1){
                    numerator = Integer.parseInt(s.substring(0, s.indexOf("/")));
                }else{
                    numerator = Integer.parseInt(s)*abs(denominator);
                }
            }
            this.Cancellation();
        }
        
        void Cancellation(){
            long g = gcd(abs(numerator), abs(denominator));
            numerator /= g;
            denominator /= g;
            if (denominator < 0){
                numerator *= -1;
                denominator *= -1;
            }
        }
        
        public String toString(){
            String s = "";
            if (numerator == 0){
                return "0";
            }
            if (numerator < 0){
                s += "-";
            }
            if (abs(numerator) >= denominator){
                s += Long.toString(abs(numerator) / denominator) + " ";
            }
            if (abs(numerator) % denominator != 0){
                s += Long.toString(abs(numerator) % denominator);
            }else{
                s = s.substring(0, s.length()-1);
            }
            if (denominator != 1){
                s += "/" + Long.toString(denominator);
            }
            return s;
        }
        
        public Fraction add(Fraction f){
            Fraction fResult = new Fraction();
            fResult.denominator = lcm(denominator, f.denominator);
            fResult.numerator = numerator * fResult.denominator / denominator + f.numerator * fResult.denominator / f.denominator;
            fResult.Cancellation();
            return fResult;
        }
        
        public Fraction subtract(Fraction f){
            Fraction fResult = new Fraction();
            fResult.denominator = lcm(denominator, f.denominator);
            fResult.numerator = numerator * fResult.denominator / denominator - f.numerator * fResult.denominator / f.denominator;
            fResult.Cancellation();
            return fResult;
        }
        
        public Fraction multiply(Fraction f){
            Fraction fResult = new Fraction();
            fResult.numerator = numerator * f.numerator;
            fResult.denominator = denominator * f.denominator;
            fResult.Cancellation();
            return fResult;
        }
        
        public Fraction divide(Fraction f){
            Fraction fResult = new Fraction();
            fResult.numerator = numerator * f.denominator;
            fResult.denominator = denominator * f.numerator;
            fResult.Cancellation();
            return fResult;
        }
        
        @Override
        public int compareTo(Fraction f){
            long g = gcd(denominator, f.denominator);
            long res = numerator * (f.denominator / g) - f.numerator * (denominator / g);
            if (res < 0){
                return -1;
            }
            if (res > 0){
                return 1;
            }
            return 0;
        }
        
        public Fraction clone(){
            Fraction fResult = new Fraction(numerator, denominator);
            return fResult;
        }
        
        public Fraction floor(){
            Fraction fResult = this.clone();
            fResult.numerator = (fResult.numerator / fResult.denominator) * fResult.denominator;
            return fResult;
        }
        
        public Fraction ceil(){
            Fraction fResult = this.clone();
            fResult.numerator = (fResult.numerator/fResult.denominator + 1) * fResult.denominator;
            return fResult;
        }
        
        public Fraction binpow(int n){
            if (n==0) return FRACTION_ONE;
            if ((n&1)==0){
                Fraction f=this.binpow(n/2);
                return f.multiply(f);
            }else return binpow(n-1).multiply(this);
        }
    }
    
    static public class FenwickTree_1{  //One-dimensional array     
        
        int n;
        long[] t;
        
        public FenwickTree_1(int n){
            this.n = n;
            t = new long[n];
        }
        
        public long sum(int xl, int xr){
            return sum(xr) - sum(xl);
        }
        
        public long sum(int x){
            long result = 0;
            for (int i = x; i >= 0; i = (i & (i + 1)) - 1){
                result += t[i];
            }
            return result;
        }
        
        public void update(int x, long delta){
            for (int i = x; i < n; i = (i | (i + 1))){
                t[i] += delta;
            }
        }
    }
    
    static public class FenwickTree_2{  //Two-dimensional array
        
        int n, m;
        long[][] t;
        
        public FenwickTree_2(int n, int m){
            this.n = n;
            this.m = m;
            t = new long[n][m];
        }
        
        public long sum(int xl, int yl, int xr, int yr){
            return sum(xr, yr) - sum(xl - 1, yr) - sum(xr, yl - 1) + sum(xl - 1, yl - 1);
        }
        
        public long sum(int x, int y){
            long result = 0;
            for (int i = x; i >= 0; i = (i & (i + 1)) - 1){
                for (int j = y; j >= 0; j = (j & (j + 1)) - 1){
                    result+=t[i][j];
                }
            }
            return result;
        }
        
        public void update(int x, int y, long delta){
            for (int i = x; i < n; i = (i | (i + 1))){
                for (int j = y; j < m; j = (j | (j + 1))){
                    t[i][j] += delta;
                }
            }
        }
    }
    
    static public class FenwickTree_3{  //Three-dimensional array
        
        int n, m, l;
        long[][][] t;
        
        public FenwickTree_3(int n, int m, int l){
            this.n = n;
            this.m = m;
            this.l = l;
            t = new long[n][m][l];
        }
        
        public long sum(int xl, int yl, int zl, int xr, int yr, int zr){
            return sum(xr, yr, zr) - sum(xl - 1, yr, zr)
            + sum(xl - 1, yr, zl - 1) - sum(xr, yr, zl - 1)
            - sum(xr, yl - 1, zr) + sum(xl - 1, yl - 1, zr)
            - sum(xl - 1, yl - 1, zl - 1) + sum(xr, yl - 1, zl - 1);
        }
        
        public long sum(int x, int y, int z){
            long result = 0;
            for (int i = x; i >= 0; i = (i & (i + 1)) - 1){
                for (int j = y; j >= 0; j = (j & (j + 1)) - 1){
                    for (int k = z; k >= 0; k = (k & (k + 1)) - 1){
                        result += t[i][j][k];
                    }
                }
            }
            return result;
        }
        
        public void update(int x, int y, int z, long delta){
            for (int i = x; i < n; i = (i | (i + 1))){
                for (int j = y; j < n; j = (j | (j + 1))){
                    for (int k = z; k < n; k = (k | (k + 1))){
                        t[i][j][k] += delta;
                    }
                }
            }
        }
    }
}

