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.lang.reflect.Array;
import java.util.*;
import java.io.*;


public class Solution {
    static Scanner sc = new Scanner(System.in);
    static PrintWriter pw = new PrintWriter(System.out);

    static void solve(){
        int n = sc.nextInt();
        int[] arr = new int[n];
        for (int i = 0; i < n; i ++){
            arr[i] = sc.nextInt();
        }
        ArrayList<Integer> sequence = new ArrayList<>();
        boolean up = false;
        sequence.add(arr[0]);
        if (arr[1] > arr[0]){
            up = true;
        }
        for (int i = 1; i < n - 1; i ++){
            if (up){
                if (arr[i + 1] < arr[i]){
                    sequence.add(arr[i]);
                    up = false;
                }
            } else {
                if (arr[i + 1] > arr[i]){
                    sequence.add(arr[i]);
                    up = true;
                }
            }
        }
        sequence.add(arr[n - 1]);
        pw.println(sequence.size());
        for (int a: sequence){
            pw.print(a + " ");
        }
        pw.println();
    }

    public static void main(String[] args){

        int t = sc.nextInt();
        for (int i = 0; i < t; i ++){
            solve();
        }
        pw.close();

    }

}