#include using namespace std; int main(){ int a,b,c; scanf("%d %d %d",&a,&b,&c); if(a+b<=c||a+c<=b||b+c<=a){ printf("Not triangle\n"); } else if ((aa+bb)==cc||(aa+cc)==bb||(bb+cc)==aa){ printf("Right triangle\n"); } else if ((aa+bb)>cc&&(aa+cc)>bb&&(bb+cc>aa)){ printf("Acute triangle\n"); } else{ printf("Obtuse triangle\n"); } if(a==b||b==c||a==c){ printf("Isosceles triangle\n");

	}
	if(a==b&&b==c){
		printf("Equilateral triangle\n");
	}
return 0;

}