You are given an array a consisting of n integers. Indices of the array start from zero (i. e. the first element is a_0, the second one is a_1, and so on).

You can reverse at most one subarray (continuous subsegment) of this array. Recall that the subarray of a with borders l and r is a[l; r] = a_l, a_{l + 1}, ..., a_{r}.

Your task is to reverse such a subarray that the sum of elements on even positions of the resulting array is maximized (i. e. the sum of elements a_0, a_2, ..., a_{2k} for integer k = ⌊(n-1)/(2)⌋ should be maximum possible).

You have to answer t independent test cases.

Input

The first line of the input contains one integer t (1 ≤ t ≤ 2 ⋅ 10^4) — the number of test cases. Then t test cases follow.

The first line of the test case contains one integer n (1 ≤ n ≤ 2 ⋅ 10^5) — the length of a. The second line of the test case contains n integers a_0, a_1, ..., a_{n-1} (1 ≤ a_i ≤ 10^9), where a_i is the i-th element of a.

It is guaranteed that the sum of n does not exceed 2 ⋅ 10^5 (∑ n ≤ 2 ⋅ 10^5).

Output

For each test case, print the answer on the separate line — the maximum possible sum of elements on even positions after reversing at most one subarray (continuous subsegment) of a.

Example

Input


4
8
1 7 3 4 7 6 2 9
5
1 2 1 2 1
10
7 8 4 5 7 6 8 9 7 3
4
3 1 2 1


Output


26
5
37
5
import java.util.*;
import java.io.*;

public class A2oj2 implements Runnable {

    static FastReader sc;
    static PrintWriter out;
    static int mod = 1000000007;

    public static void main(String[] args) {
        new Thread(null, new A2oj2(), "coderrohan14", 1 << 26).start();
    }

    @Override
    public void run() {
        try {
            ioSetup();
        } catch (IOException e) {
            return;
        }
    }

    public static void ioSetup() throws IOException {
        if (System.getProperty("ONLINE_JUDGE") == null) {
            File f1 = new File("input.txt");
            File f2 = new File("output.txt");
            Reader r = new FileReader(f1);
            sc = new FastReader(r);
            out = new PrintWriter(f2);
            double prev = System.currentTimeMillis();
            solve();
            out.println("\n\nExecuted in : " + ((System.currentTimeMillis() - prev) / 1e3) + " sec");
        } else {
            sc = new FastReader(new InputStreamReader(System.in));
            out = new PrintWriter(System.out);
            solve();
        }
        out.flush();
        out.close();
    }

    static void solve() {
        int t = sc.nextInt();
        StringBuilder ans = new StringBuilder("");
        while (t-- > 0) {
            int n = sc.nextInt();
            long[] arr = sc.readArrayL(n);
            long[][] dp = new long[n + 1][3];
            for (int i = 0; i < n; i++) {
                dp[i + 1][0] = Math.max(dp[i + 1][0], dp[i][0] + ((i % 2 == 0) ? arr[i] : 0));
                if (i + 2 <= n) {
                    dp[i + 2][1] = Math.max(dp[i + 2][1],
                            Math.max(dp[i][0], dp[i][1]) + ((i % 2 == 0) ? arr[i + 1] : arr[i]));
                }
                dp[i + 1][2] = Math.max(dp[i + 1][2],
                        Math.max(dp[i][0], Math.max(dp[i][1], dp[i][2])) + ((i % 2 == 0) ? arr[i] : 0));
            }
            ans.append(Math.max(Math.max(dp[n][0], dp[n][1]), dp[n][2]) + "\n");
        }
        out.println(ans);
    }

    /****************************************************************************************************************************************************************************************/

    static long modInverse(long a, int mod) {
        long g = gcd(a, mod);
        if (g != 1)
            return -1;
        else {
            return modPower(a, mod - 2L, mod);
        }
    }

    static long modPower(long x, long y, int mod) {
        long res = 1;
        x = x % mod;
        if (x == 0)
            return 0;
        while (y > 0) {
            if ((y & 1) != 0)
                res = (res * x) % mod;
            y = y >> 1;
            x = (x * x) % mod;
        }
        return res;
    }

    static int gcd(int a, int b) {
        int tmp = 0;
        while (b != 0) {
            tmp = b;
            b = a % b;
            a = tmp;
        }
        return a;
    }

    static long gcd(long a, long b) {
        long tmp = 0;
        while (b != 0) {
            tmp = b;
            b = a % b;
            a = tmp;
        }
        return a;
    }

    static boolean isPrime(long n) {
        if (n == 2 || n == 3)
            return true;
        if (n % 2 == 0)
            return false;
        for (long i = 3; i * i <= n; i += 2) {
            if (n % i == 0)
                return false;
        }
        return n != 1;
    }

    static boolean isPerfectSquare(long x) {
        long sqrt = (long) Math.sqrt(x);
        return (sqrt * sqrt) == x;
    }

    static int digitsCount(long x) {
        return (int) Math.floor(Math.log10(x)) + 1;
    }

    static boolean isPowerTwo(long n) {
        return (n & n - 1) == 0;
    }

    static void sieve(boolean[] prime, int n) { // Sieve Of Eratosthenes
        for (int i = 1; i <= n; i++) {
            prime[i] = true;
        }
        for (int i = 2; i * i <= n; i++) {
            if (prime[i]) {
                for (int j = 2; i * j <= n; j++) {
                    prime[i * j] = false;
                }
            }
        }
    }

    static long nCr(long n, long r) { // Combinations
        if (n < r)
            return 0;
        if (r > n - r) { // because nCr(n, r) == nCr(n, n - r)
            r = n - r;
        }
        long ans = 1L;
        for (long i = 0; i < r; i++) {
            ans *= (n - i);
            ans /= (i + 1);
        }
        return ans;
    }

    static int floor(int[] a, int v) {
        int l = 0, h = a.length - 1;
        while (l < h) {
            int mid = (l + h) / 2;
            if (a[mid] == v)
                return mid;
            if (v < a[mid])
                h = mid;
            else {
                if (mid + 1 < h && a[mid + 1] < v)
                    l = mid + 1;
                else
                    return mid;
            }
        }
        return a[l] <= v ? l : -1;
    }

    static int floor(long[] a, long v) {
        int l = 0, h = a.length - 1;
        while (l < h) {
            int mid = (l + h) / 2;
            if (a[mid] == v)
                return mid;
            if (v < a[mid])
                h = mid;
            else {
                if (mid + 1 < h && a[mid + 1] < v)
                    l = mid + 1;
                else
                    return mid;
            }
        }
        return a[l] <= v ? l : -1;
    }

    static int ceil(int[] a, int v) {
        int l = 0, h = a.length - 1;
        while (l < h) {
            int mid = (l + h) / 2;
            if (a[mid] == v)
                return mid;
            if (a[mid] < v)
                l = mid + 1;
            else
                h = mid;
        }
        return a[h] >= v ? h : -1;
    }

    static int ceil(long[] a, long v) {
        int l = 0, h = a.length - 1;
        while (l < h) {
            int mid = (l + h) / 2;
            if (a[mid] == v)
                return mid;
            if (a[mid] < v)
                l = mid + 1;
            else
                h = mid;
        }
        return a[h] >= v ? h : -1;
    }

    static long catalan(int n) { // n-th Catalan Number
        long c = nCr(2 * n, n);
        return c / (n + 1);
    }

    static class Pair implements Comparable<Pair> { // Pair Class
        int x;
        int y;

        public Pair(int x, int y) {
            this.x = x;
            this.y = y;
        }

        @Override
        public boolean equals(Object o) {
            if (this == o) {
                return true;
            }
            if (!(o instanceof Pair)) {
                return false;
            }

            Pair pair = (Pair) o;

            if (x != pair.x) {
                return false;
            }
            if (y != pair.y) {
                return false;
            }

            return true;
        }

        @Override
        public int hashCode() {
            long result = x;
            result = 31 * result + y;
            return (int) result;
        }

        @Override
        public int compareTo(Pair o) {
            return (int) (this.x - o.x);
        }
    }

    static class Trip { // Triplet Class
        long x;
        long y;
        long z;

        Trip(long x, long y, long z) {
            this.x = x;
            this.y = y;
            this.z = z;
        }

        @Override
        public boolean equals(Object o) {
            if (this == o) {
                return true;
            }
            if (!(o instanceof Trip)) {
                return false;
            }

            Trip trip = (Trip) o;

            if (x != trip.x) {
                return false;
            }
            if (y != trip.y) {
                return false;
            }
            if (z != trip.z) {
                return false;
            }
            return true;
        }

        @Override
        public int hashCode() {
            long result = 62 * x + 31 * y + z;
            return (int) result;
        }
    }

    /**************************************************************************************************************************************************************************************/

    static class FastReader {
        BufferedReader br;
        StringTokenizer st;

        public FastReader(Reader r) {
            br = new BufferedReader(r);
        }

        String next() {
            while (st == null || !st.hasMoreElements()) {
                try {
                    st = new StringTokenizer(br.readLine());
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            return st.nextToken();
        }

        int nextInt() {
            return Integer.parseInt(next());
        }

        long nextLong() {
            return Long.parseLong(next());
        }

        double nextDouble() {
            return Double.parseDouble(next());
        }

        int[] readArrayI(int n) {
            int[] arr = new int[n];
            for (int i = 0; i < n; i++) {
                arr[i] = sc.nextInt();
            }
            return arr;
        }

        long[] readArrayL(int n) {
            long[] arr = new long[n];
            for (int i = 0; i < n; i++) {
                arr[i] = sc.nextLong();
            }
            return arr;
        }

        String nextLine() {
            String str = "";
            try {
                str = br.readLine();
            } catch (IOException e) {
                e.printStackTrace();
            }
            return str;
        }
    }

    /*
     * ASCII Range--->(A-Z)--->[65,90]<<::>>(a-z)--->[97,122]
     */
    /******************************************************************************************************************/

    static void printArray(int[] arr) {
        out.print("[");
        for (int i = 0; i < arr.length; i++) {
            if (i < arr.length - 1)
                out.print(arr[i] + ",");
            else
                out.print(arr[i]);
        }
        out.print("]");
        out.println();
    }

    static void printArray(long[] arr) {
        out.print("[");
        for (int i = 0; i < arr.length; i++) {
            if (i < arr.length - 1)
                out.print(arr[i] + ",");
            else
                out.print(arr[i]);
        }
        out.print("]");
        out.println();
    }

    static void printArray(double[] arr) {
        out.print("[");
        for (int i = 0; i < arr.length; i++) {
            if (i < arr.length - 1)
                out.print(arr[i] + ",");
            else
                out.print(arr[i]);
        }
        out.print("]");
        out.println();
    }
    /**********************************************************************************************************************/
}