#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[2]<(a[0]+a[1])){
        cout<<"Not triangle"<<endl;
return 0; 
    }
    if((a[2]*a[2])==(a[0]*a[0]+a[1]*a[1])&&(a[0]==a[1])){
        cout<<"Right triangle"<<endl;
        cout<<"Isosceles triangle"<<endl;
return 0;        
}
    if((a[2]*a[2])<(a[0]*a[0]+a[1]*a[1])&&(a[0]==a[1])){
        cout<<"Obtuse triangle"<<endl;
        cout<<"Isosceles triangle"<<endl;
return 0;        
    }
    if(a[0]==a[1]&&a[1]==a[2]){
        cout<<"Acute triangle"<<endl;
        cout<<"Isosceles triangle"<<endl;
        cout<<"Equilateral triangle"<<endl;
return 0;        
    }
    if((a[2]*a[2])>(a[0]*a[0]+a[1]*a[1]))&&a[0]==a[1]){
        cout<<"Acute triangle"<<endl;
        cout<<"Isosceles triangle"<<endl;
    }
    if((a[2]*a[2])==(a[0]*a[0]+a[1]*a[1])){
        cout<<"Right triangle"<<endl;
    }
    if((a[2]*a[2])>(a[0]*a[0]+a[1]*a[1])){
        cout<<"Acute triangle"<<endl;
    }
    if((a[2]*a[2])<(a[0]*a[0]+a[1]*a[1])){
        cout<<"Obtuse triangle"<<endl;
    }
return 0;
}