#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;//判定能不能组成三角形
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;//判定能不能组成等腰直角
return 0;        
}
    if(a[0]==a[1]&&a[1]==a[2]){
        cout<<"Acute triangle"<<endl;
        cout<<"Isosceles triangle"<<endl;
        cout<<"Equilateral triangle"<<endl;//判定能不能组成等边
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;//判定能不能组成等腰钝角
    }
    if((a[2]*a[2])==(a[0]*a[0]+a[1]*a[1])){
        cout<<"Right triangle"<<endl;//判定能不能组成普通直角
    }
    if((a[2]*a[2])<(a[0]*a[0]+a[1]*a[1])){
        cout<<"Acute triangle"<<endl;//判定能不能组成普通锐角
    }if((a[2]*a[2])>(a[0]*a[0]+a[1]*a[1])){
        cout<<"Obtuse triangle"<<endl;//判定能不能组成普通钝角
    }
return 0;
}