#include<bits/stdc++.h> using namespace std;

int main(){ int a,b,c; cin>>a>>b>>c; if(a>b) swap(a,b); if(a>c) swap(a,c); if(b>c) swap(b,c); if(a+b<=c){ cout<<"Not triangle"; return 0; } if(aa+bbcc)cout<<"Right triangle"<<endl; if(aa+bb>cc)cout<<"Acute triangle"<<endl; if(aa+bb<c*c)cout<<"Obtuse triangle"<<endl; if(ab||bc||ac)cout<<"Isosceles triangle"<<endl; if(ab&&bc)cout<<"Equilateral triangle"<<endl; return 0; }