#include <bits/stdc++.h> using namespace std; int main() { double kg,cm,m=0,bmi=0; cin>>kg>>cm; m=cm/100; bmi=kg/(m*m); if(bmi<18.5) cout<<"thin"; else if(bmi>=18.5&&bmi<=24) cout<<"great"; else if(bmi>24) cout<<"fat"; return 0; }