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