Problem: A permutation of length n is a sequence of integers from 1 to n of length n containing each number exactly once. For example, [1], [4, 3, 5, 1, 2], [3, 2, 1] are permutations, and [1, 1], [0, 1], [2, 2, 1, 4] are not.

There was a permutation p[1 ... n]. It was merged with itself. In other words, let's take two instances of p and insert elements of the second p into the first maintaining relative order of elements. The result is a sequence of the length 2n.

For example, if p=[3, 1, 2] some possible results are: [3, 1, 2, 3, 1, 2], [3, 3, 1, 1, 2, 2], [3, 1, 3, 1, 2, 2]. The following sequences are not possible results of a merging: [1, 3, 2, 1, 2, 3], [3, 1, 2, 3, 2, 1], [3, 3, 1, 2, 2, 1].

For example, if p=[2, 1] the possible results are: [2, 2, 1, 1], [2, 1, 2, 1]. The following sequences are not possible results of a merging: [1, 1, 2, 2], [2, 1, 1, 2], [1, 2, 2, 1].

Your task is to restore the permutation p by the given resulting sequence a. It is guaranteed that the answer exists and is unique.

You have to answer t independent test cases.

Input

The first line of the input contains one integer t (1 ≤ t ≤ 400) — the number of test cases. Then t test cases follow.

The first line of the test case contains one integer n (1 ≤ n ≤ 50) — the length of permutation. The second line of the test case contains 2n integers a_1, a_2, ..., a_{2n} (1 ≤ a_i ≤ n), where a_i is the i-th element of a. It is guaranteed that the array a represents the result of merging of some permutation p with the same permutation p.

Output

For each test case, print the answer: n integers p_1, p_2, ..., p_n (1 ≤ p_i ≤ n), representing the initial permutation. It is guaranteed that the answer exists and is unique.

Example

Input


5
2
1 1 2 2
4
1 3 1 4 3 4 2 2
5
1 2 1 2 3 4 3 5 4 5
3
1 2 3 1 2 3
4
2 3 2 4 1 3 4 1


Output


1 2 
1 3 4 2 
1 2 3 4 5 
1 2 3 
2 3 4 1 

Solution (in JAVA):

Solution:
import java.util.Scanner;
import java.lang.ArrayIndexOutOfBoundsException;
public class P1385B {
	public static Scanner ip;
	public static void main(String a[]){
		int times;
		int [][]arr;
		int []len;
		int ipn;
		boolean []used;
		int k;
		ip= new Scanner(System.in);
		times=ip.nextInt();
		len = new int[times];
		arr = new int[times][];
		for(int i=0;i<times;i++){
			len[i]=ip.nextInt();
			k=0;
			arr[i]= new int[len[i]];
			used= new boolean[len[i]];
			for(int j=0;j<len[i]*2;j++){
				ipn=ip.nextInt();
				try{
					if(!used[ipn-1]){
						arr[i][k]=ipn;
						used[ipn-1]=true;
						k++;
					}
				}
				catch(ArrayIndexOutOfBoundsException e){
					System.out.println(e+"\n"+"Input Again");
					
				}
				//System.out.println(i+"  "+j+" "+k);
			}
			
		}
		for(int i=0;i<times;i++){
			for(int j=0;j<len[i];j++){
				System.out.print(arr[i][j]+ " ");
			}
			System.out.println(" ");				
		}

	}
}