#include<iostream>
using namespace std;
int main(){
    int a,b,c;
    cin>>a>>b>>c;
    if(a+b>c&&a+c>b&&b+c>a){
        if(a*a+b*b==c*c||a*a+c*c==b*b||b*b+c*c==a*a){
            cout<<"Right triangle";
            if(a==b||b==c||c==a){
                cout<<"\nIsosceles triangle";
            }
        }else if(a*a+b*b<c*c||a*a+c*c<b*b||b*b+c*c<a*a){
            cout<<"Obtuse triangle";
            if(a==b||b==c||c==a){
                cout<<"\nIsosceles triangle";
            }
        }else{
            cout<<"Acute triangle";
            if(a==b||b==c||c==a){
                cout<<"\nIsosceles triangle\nEquilateral triangle";
            }
        }
    }else{
        cout<<"Not triangle";
    }
    return 0;
}