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