#include <bits/stdc++.h>
using namespace std;
int a[3]; 
int main(){
	//freopen(".in","r",stdin);
	//freopen(".out","w",stdout);
	cin >> a[0] >> a[1] >> a[2];
	sort(a,a+3);
	if (a[0]*a[0]+a[1]*a[1] == a[2]*a[2]){
		cout << "Right triangle";
	}
	if (a[0]*a[0]+a[1]*a[1] < a[2]*a[2]){
		cout << "Obtuse triangle";
	}
	if (a[0]*a[0]+a[1]*a[1] > a[2]*a[2]){
		cout << "Acute triangle";
	}
	return 0;
}