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