#include<iostream>
using namespace std;
int main()
{
	int a, b, c;
	cin >> a >> b >> c;
	if (a > b)  swap(a,b);
	if (a > c)  swap(a,c);
	if (b > c)  swap(b,c);
	if ((a + b) <= c) //三角形
	{ 
		cout << "Not triangle";
	}
	else 
	{
		if ((a * a + b * b) > c * c)//锐角三角形
		{
			cout << "Acute triangle" << endl;
		}
		else if ((a * a + b * b) == c * c)//直角三角形
		{
			cout << "ORight triangle" << endl;
		}
		else
		{
			cout << "Obtuse triangle" << endl;//钝角三角形
		}
		if (a == b||b==c||a==c)//等腰三角形
		{
			cout << "Isosceles triangle" << endl;
			if (a == b && b == c)
				cout << "Equilateral triangle" << endl;
		}
	}
	return 0;
	
}