Problem: Given a permutation p of length n, find its subsequence s_1, s_2, …, s_k of length at least 2 such that:

  * |s_1-s_2|+|s_2-s_3|+…+|s_{k-1}-s_k| is as big as possible over all subsequences of p with length at least 2. 
  * Among all such subsequences, choose the one whose length, k, is as small as possible. 



If multiple subsequences satisfy these conditions, you are allowed to find any of them.

A sequence a is a subsequence of an array b if a can be obtained from b by deleting some (possibly, zero or all) elements.

A permutation of length n is an array of length n in which every element from 1 to n occurs exactly once.

Input

The first line contains an integer t (1 ≤ t ≤ 2 ⋅ 10^4) — the number of test cases. The description of the test cases follows.

The first line of each test case contains an integer n (2 ≤ n ≤ 10^5) — the length of the permutation p.

The second line of each test case contains n integers p_1, p_2, …, p_{n} (1 ≤ p_i ≤ n, p_i are distinct) — the elements of the permutation p.

The sum of n across the test cases doesn't exceed 10^5.

Output

For each test case, the first line should contain the length of the found subsequence, k. The second line should contain s_1, s_2, …, s_k — its elements.

If multiple subsequences satisfy these conditions, you are allowed to find any of them.

Example

Input


2
3
3 2 1
4
1 3 4 2


Output


2
3 1 
3
1 4 2 

Note

In the first test case, there are 4 subsequences of length at least 2:

  * [3,2] which gives us |3-2|=1. 
  * [3,1] which gives us |3-1|=2. 
  * [2,1] which gives us |2-1|=1. 
  * [3,2,1] which gives us |3-2|+|2-1|=2. 



So the answer is either [3,1] or [3,2,1]. Since we want the subsequence to be as short as possible, the answer is [3,1].

Solution (in JAVA):

Solution:
import java.io.*;
import java.util.*;

/**
 * Created by Ayushi on 13 Jun 2020.
 * Problem:
 * Round:
 */

public class B {
    public static void main(String[] args) throws IOException {
        StringTokenizer st;
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        int t = Integer.parseInt(br.readLine());

        while (t-- > 0) {
            int n = Integer.parseInt(br.readLine());
            st = new StringTokenizer(br.readLine(), " ");
            int[] a = new int[n];
            int j = 0;
            while (st.hasMoreTokens()) {
                a[j] = Integer.parseInt(st.nextToken());
                j++;
            }

            int m = 1;
            StringBuilder sb = new StringBuilder(a[0] + " ");
            for (int i = 1; i < n-1; i++) {
                if (!(a[i-1] < a[i] && a[i] < a[i+1]) && !((a[i - 1] > a[i]) && (a[i] > a[i + 1]))) {
                    sb.append(a[i]);
                    sb.append(" ");
                    m++;
                }
            }
            if (n >= 2) {
                sb.append(a[n - 1]);
                m++;
            }
            System.out.println(m);
            System.out.println(sb.toString());
        }
        br.close();
    }
}