#include<bits/stdc++.h>
using namespace std;
int main(){
	int a,b,c;
	cin>>a>>b>>c;
	if(a>b){
		swap(a,b);
		if(b>c) swap(b,c);
	}
	else{
		swap(b,c);
		if(a>b) swap(a,b);
	}
	if(a+b<c) cout<<"Not triangle";
	else{
		if(a*a+b*b==c*c) cout<<"Right triangle"<<endl;
		if(a*a+b*b>c*c) cout<<"Acute triangle"<<endl;
		if(a*a+b*b<c*c) cout<<"Obtuse triangle"<<endl;
		if(a==b||b==c) cout<<"Isosceles triangle"<<endl;
		if(a==b&&b==c) cout<<"Equilateral triangle"<<endl;
	}
}

各位大牛，请问我错哪了