#include <stdio.h>
#include <iostream>
using namespace std;
int getmax(int a,int b)
{
    if(a > b) return a;
    return b; 
}
int getmin(int a,int b)
{
    if(a < b) return a;
    return b;
}

int k[1100];
int main()
{
    int t;
    scanf("%d",&t);
    while(t--)
    {
        int n;
        scanf("%d",&n);
        memset(k,0,sizeof(k));
        int i = n;
        while(i--)
        {
            int tmp;
            scanf("%d",&tmp);
            k[tmp] = 1;    
        }
        bool flag = false;
        for(int j = 1; j <= n+2; j++)
        {
            
            if(k[j] == 0 && flag == false) printf("%d",j),flag = true;
            else if(k[j] == 0 && flag == true) printf(" %d\n",j);
        }
        
    }
    return 0;
}