#include<iostream>
#include<algorithm>
using namespace std;
int a,b,c;
int main() {
	scanf("%d%d%d",&a,&b,&c);
	int d[4]={0,a,b,c};
	sort(d+1,d+4);
	if(d[1]+d[2]<=d[3])  printf("Not triangle\n");
	if(d[1]*d[1]+d[2]*d[2]==d[3]*d[3])	printf("Right triangle\n");
	else if(d[1]*d[1]+d[2]*d[2]>d[3]*d[3])	printf("Acute triangle\n");
	else if(d[1]*d[1]+d[2]*d[2]<d[3]*d[3])  printf("Obtuse triangle\n");
	if(a==b||b==c||a==c)  printf("Isosceles triangle\n");
	if(a==b&&b==c)  printf("Equilateral triangle\n");
	return 0;
}