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.util.*;
public class Graph
{
    public static void main (String[] args) {
        Scanner sc=new Scanner(System.in);
        int t=sc.nextInt();
        while(--t>=0){
            int n=sc.nextInt();
            int a[]=new int[n];
            for(int i=0;i<n;i++){
                a[i]=sc.nextInt();
            }
            ArrayList<Integer> arr=new ArrayList<>();
            arr.add(a[0]);
            for(int i=1;i<n-1;i++){
                if(a[i]<=a[i-1]&&a[i+1]<=a[i])
                continue;
                else if(a[i]>=a[i-1]&&a[i+1]>=a[i])
                continue;
                arr.add(a[i]);
            }
            arr.add(a[n-1]);
            if(arr.size()==1){
                System.out.println(2);
                System.out.println(a[0]+" "+a[1]);
            }
            else{
                System.out.println(arr.size());
                for(int i=0;i<arr.size();i++){
                    System.out.print(arr.get(i)+" ");
                }
                System.out.println();
            }
            
        }
    }
    
}