#include<bits/stdc++.h>
using namespace std;
int main()
{
	int a,b,c;
	cin>>a>>b>>c;
	int ab=a+b,bc=b+c,ac=a+c;
	if(ab<=c||bc<=a||ac<=b)
	{
		cout<<"Not triangle";
		return 0;
	}
	int a1=a*a,b1=b*b,c1=c*c;
	if(a1+b1>c1)
	{
		cout<<"Acute triangle"<<endl;
	}
	else if(a1+b1<c1)
	{
		cout<<"Obtuse triangle"<<endl;
	}
	//if(a1+b1==c1)
	else
	{
		cout<<"Right triangle"<<endl;
	}
	if(a==b&&b==c&&c==a)
	{
		cout<<"Equilateral triangle"<<endl;
	}
	else if(a==b||b==c||a==c)
	{
		cout<<"Isosceles triangle"<<endl;
	}
    return 0;
}