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