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