#include <stdio.h>  

int main() {  
    int i,j,k;
    scanf("%d%d%d",&i,&j,&k);
    if(i+j>k&&i+k>j&&j+k>i){
    	
    if((i*i+j*j==k*k)||(j*j+k*k==i*i)||(k*k+i*i==j*j))
    printf("Right triangle\n");
 	else    
 	
	if((i*i<j*j+k*k)||(j*j<i*i+k*k)||(k*k<i*i+j*j)) 
	printf("Acute triangle\n");
	else 
	printf("Obtuse triangle\n");
 
    if(i==j||j==k||i==k)printf("Isosceles triangle\n");
    
    if(i==j&&j==k)printf("Equilateral triangle\n");}
  	else printf("Not triangle\n");}