#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
int main() {
    ll T;
    cin>>T;
    while(T--)
    {
        ll n;
        cin>>n;
        vector<ll>v(n);
        ll min1=1e9,min2=1e9;
        for(int i=0;i<n;i++){ 
            cin>>v[i];
            if(i%2==0) { if(v[i]<min1) min1=v[i];}
            else { if(v[i]<min2) min2=v[i];}
        }
    if((min1+min2)%2==0) cout<<"GEGE"<<endl;
    else cout<<"BEN"<<endl;
    }
 return 0;
}
// 64 位输出请用 printf("%lld")