#include<bits/stdc++.h>
using namespace std;
int minn(int a,int b,int c)
{
	return min(a,min(b,c));
}
int maxn(int a,int b,int c)
{
	return max(a,max(b,c));
}
int midn(int a,int b,int c)
{
	if(a!=maxn(a,b,c)&&a!=minn(a,b,c))
	return a;
	else if(b!=maxn(a,b,c)&&b!=minn(a,b,c))
	return b;
	else return c;
}
int main()
{
	int a,b,c;
	cin>>a>>b>>c;
	if(a+b<=c||a+c<=b||b+c<=a)
	{
	cout<<"Not triangle";
	return 0;
	}
	else 
	{
	if(a*a+b*b==c*c||b*b+c*c==a*a||a*a+c*c==b*b)
	cout<<"Right triangle"<<endl;
	if(minn(a,b,c)*min(a,b,c)+midn(a,b,c)*midn(a,b,c)>maxn(a,b,c)*maxn(a,b,c))
	cout<<"Acute triangle"<<endl;
	if(minn(a,b,c)*min(a,b,c)+midn(a,b,c)*midn(a,b,c)<maxn(a,b,c)*maxn(a,b,c))
	cout<<"Obtuse triangle"<<endl;
	if(a==b||a==c||b==c)
	cout<<"Isosceles triangle"<<endl;
	if(a==b&&b==c&&a==c)
	cout<<"Equilateral triangle"<<endl;	
	}
	return 0;
}