#include<bits/stdc++.h>
using namespace std;
int main()
{
    short a[2];
    cin>>a[0]>>a[1]>>a[2];
    sort(a,a+3);
    if(a[0]+a[1]>=a[2])
    {
        if(a[0]*a[0]+a[1]*a[1]==a[2]*a[2])
            cout<<"Right triangle"<<endl;
        else if(a[0]*a[0]+a[1]*a[1]>a[2]*a[2])
            cout<<"Acute triangle"<<endl;
        else
            cout<<"Obtuse triangle"<<endl;
        if(a[1]==a[0])
        {
            if(a[0]==a[2])
                cout<<"Equilateral triangle";
            else
                cout<<"Isosceles triangle";
        }
        else if(a[1]==a[2])
        {
            if(a[0]==a[2])
                cout<<"Equilateral triangle";
            else
                cout<<"Isosceles triangle";
        }
    }
    else
        cout<<"Not triangle";
    return 0;
}