#include<bits/stdc++.h> using namespace std; double n,m,ans; int main(){ //freopen("health.in","r",stdin); //freopen("health.out","w",stdout); cin>>n>>m; m/=100; ans=n/m/m; if(ans<18.5){ cout<<"thin"; } else if(ans>=18.5&&ans<=24){ cout<<"great"; } else if(ans>24){ cout<<"fat"; } return 0; }