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