#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){
        if(a*a+c*c==b*b||b*b+a*a==c*c||a*a+b*b==c*c){
            printf("Right triangle\n");
        }
        else if(a*a+c*c<b*b||b*b+a*a<c*c||a*a+b*b<c*c){
            printf("Obtuse triangle\n");
        }
        else printf("Acute triangle\n");
        if(a==b||b==c||a==c){
            printf("Isosceles triangle\n");
        }
        if(a==b&&b==c){
            printf("Equilateral triangle\n");
        }
        
    }
    else printf("Not triangle");
    return 0;
}