#include <bits/stdc++.h>
using namespace std;
 
int main() {
int t;
cin>>t;
while(t--)
{   int size;
    cin>>size;
    int a[size];
 
    map<char,int>cnt;
    for (int i=0;i<size;i++)
    {
       cin>>a[i];
    }
    for(int i=0;i<size;i++)
    {
        cnt[a[i]]++;
    }
    int maxi=0;
    string ans;
    char p;
    for(auto x:cnt)
    {
 
        if(x.second>maxi )
        {
        	p=x.first;
            maxi=x.second;
 
 
 
        }
    }
    cout<<p<<endl;
 
 
}
 
 
}

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aaa bbb ccc bbb aaa  aaa
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geeks for geeks for geeks aaa aaa