`color(#FFFFFFff)(H)color(#E7E7E7ff)(o)color(#CFCFCFff)(r)color(#B7B7B7ff)(i)color(#9F9F9Fff)(z)color(#878787ff)(o)color(#6F6F6Fff)(n)`

#include <iostream>
using namespace std;

int main() {
    double a, b, c, d; cin >> a >> b >> c >> d;
    double tb = (a + b + 2*c + 3*d)/7;
    cout << (tb >= 8 ? "GIOI": tb >= 6.5 ? "KHA" : tb >= 5 ? "TRUNG BINH":"YEU");
}

#include<bits/stdc++.h>
using namespace std;
//( •̀ ω •́ )meothinhle

int main(){
    double a1,a2,b,c;
    cin >> a1 >> a2 >> a3 >> b >> c;
    double diem=(a1+a2+b*2+c*3)/7;
    if (diem>=8) cout<<"GIOI";
    else if (diem<8 && diem>=6.5) cout<<"KHA";
    else if (diem<6.5 && diem>=5) cout<<"TRUNGBINH";
    else cout<<"YEU";
    return 0;

}