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