#include<bits/stdc++.h>
using namespace std;
int a,b,c;
int main(){
    cin>>a>>b>>c;
    int i[3]={a,b,c};
    sort(i, i+3);
    if (i[0]+i[1]<=i[2]) {
        cout<<"Not triangle"<<"\n";
        system("pause");
        return 0;
    }
    if (i[0]*i[0]+i[1]*i[1]==i[2]*i[2])  cout<<"Right triangle"<<"\n";
    else if (i[0]*i[0]+i[1]*i[1]>i[2]*i[2])  cout<<"Acute triangle"<<"\n";
    else if (i[0]*i[0]+i[1]*i[1]<i[2]*i[2])  cout<<"Obtuse triangle"<<"\n";
    if (a==b||b==c||a==c)  cout<<"Isosceles triangle"<<"\n";
    if (a==b&&b==c)  cout<<"Equilateral trianglee"<<"\n";
    system("pause");
    return 0;
}