#include<bits/stdc++.h>
using namespace std;
int rt(int a,int b,int c)
{
int A=a*a;
int B=b*b;
int C=c*c;
if(C=A+B)
cout<<"Right triangle"<<endl;
if(C<A+B)
cout<<"Acute triangle"<<endl;
if(C>A+B)
cout<<"Obtuse triangl"<<endl;
return 0;
}
int db(int a,int b,int c)
{
if((a==b)||(a==c)||(b==c))
cout<<"Isosceles triangle"<<endl;
if(a=b=c)
cout<<"Equilateral triangle";
return 0;
}
int main()
{
int a,b,c;
cin>>a>>b>>c;
if((a+b>c)&&(a+c>b)&&(b+c>a))
{
rt(a,b,c);
db(a,b,c);
}
else
cout<<"Not triangle";
return 0;
}