It seems like the year of 2013 came only yesterday. Do you know a curious fact? The year of 2013 is the first year after the old 1987 with only distinct digits.

Now you are suggested to solve the following problem: given a year number, find the minimum year number which is strictly larger than the given one and has only distinct digits.
The single line contains integer *y* (1000 ≤ *y* ≤ 9000) — the year number.
import java.util.HashSet;
import java.util.Scanner;
public class Main {
    Public static void main(String []args) {
        Scanner sc = new Scanner(System.in);
        int y = sc.nextInt();
        sc.close();
        int nextYear = y + 1;
        while (!hasDistinctDigits(nextYear)) {
            nextYear++;
        }
        System.out.println(nextYear);
    }
        public static boolean hasDistinctDigits(int year) {
        HashSet<Integer> digits = new HashSet<>();
        while (year > 0) {
            int digit = year % 10;
            if (digits.contains(digit)) {
                return false;
            }
            digits.add(digit);
            year /= 10;
        }
        return true;
    }
}
