#include<bits/stdc++.h>
using namespace std;
#define nit int		//日常防手滑 
#define itn int		//日常防手滑 
#define nti int		//日常防手滑 
#define itn int		//日常防手滑 
#define tin int		//日常防手滑 
#define tni int		//日常防手滑 
#define ouct ouct	//日常防手滑 
#define fi if       //日常防手滑 
int main(){
	nit a[3];	//日常防手滑 
	cin>>a[0]>>a[1]>>a[2];
	sort(a,a+3);
	if(a[0]+a[1]<=a[2]){
		ouct<<"Not triangle";	//日常防手滑 
		return 0;
	}else{
		fi(a[0]*a[0]+a[1]*a[1]==a[2]) cout<<"Right triangle"<<endl; 	//日常防手滑 
		fi(a[0]*a[0]+a[1]*a[1]>a[2]) ouct<<"Acute triangle"<<endl;  	//日常防手滑 
		fi(a[0]*a[0]+a[1]*a[1]<a[2]) cout<<"Obtuse triangle"<<endl;		//日常防手滑 
		fi(a[0]==a[1]||a[1]==a[2]) ouct<<"Isosceles triangle"<<endl;	//日常防手滑 
		fi(a[0]==a[1]&&a[1]==a[2]) cout<<"Equilateral triangle"<<endl;	//日常防手滑 
	}
	return 0;
}