#include<stdio.h>
#include<math.h>
int main()
{
int a,b,c;
scanf("%d %d %d",&a,&b,&c);
if(a+b<=c||a+c<=b||c+b<=a)
{printf("Not triangle");}
else
{
if(a*a+b*b==c*c||a*a+c*c==b*b||c*c+b*b==a*a)
{printf("Right triangle\n");}
else if(a*a+b*b>c*c||a*a+c*c>b*b||c*c+b*b>a*a)
{printf("Acute triangle\n");}
else if(a*a+b*b<c*c||a*a+c*c<b*b||c*c+b*b<a*a)
{printf("Obtuse triangle\n");}
if(a==b||a==c||b==c)
{printf("Isosceles triangle\n");}
if(a==b&&b==c)
{printf("Equilateral triangle\n");}
}
return 0;
}