#include<iostream> using namespace std; int main(){ int a,b,c; cin>>a>>b>>c; if(a*a+b*b==c*c||b*b+c*c==a*a||a*a+c*c==b*b) cout<<"good"<<endl; else if(a==b||a==c||b==c) cout<<"perfect"<<endl; else cout<<"just a triangle"<<endl; return 0; }