#include<algorithm>
using namespace std;
int main()
{
    int a[2];
    scanf("%d %d %d",&a[0],&a[1],&a[2]);
    sort(a,a+3);
    if((a[0]+a[1]>a[2])&&(a[2]-a[1])<a[0])
    {
        
        int b,c,d;
        b=a[0]*a[0];
        c=a[1]*a[1];
        d=a[2]*a[2];
        if(b+c==d)
        {
            printf("Right triangle\n");
        }else if(b+c>d)
        {
            printf("Acute triangle\n");
        }else printf("Obtuse triangle\n");
        if(b==c||c==d)
        {
            printf("Isosceles triangle\n");
        }
        if(b==c&&c==d) printf("Equilateral triangle\n");
    }else printf("Not triangle\n");
    return 0;
}