#include<iostream>
using namespace std;
int main(){
	int a,b,c,s1,s2;
	
	if((a>b;b>c)||(a>c;c>b)){
		s1=b*b+c*c;
		s2=a*a;
	}else if((b>a;a>c)||(b>c;c>a)){
		s1=a*a+c*c;
		s2=b*b;
	}else if((c>a;a>b)||(c>b;a>b)){
		s1=a*a+b*b;
		s2=c*c;
	};
	
	if((a+b>c)||(a+c>b)||(b+c>a)){
		cout<<"Not triangle"<<endl;
	};
	 if(s1=s2){
		cout<<"Right triangle"<<endl;
	};
	if(s1>s2){
		cout<<"Acute triangle"<<endl;
	};
	if(s1<s2){
		cout<<"Obtuse triangle"<<endl;
	};
	if(a=b||b=c||a=c){
		cout<<"Isosceles triangle"<<endl;
	};
	if(a=b&&a=c){
		cout<<"Equilateral triangle"<<endl;
	};
	return 0;
}