#include int main() { using namespace std; int a, b, c; int x, y, z; double m;

cin >> a >> b >> c;
x = a > b ? (a > c ? a : c) : (b > c ? b : c);
y = a > b ? (a < c ? a : c) : (b < c ? b : c);
z = a < b ? (a < c ? a : c) : (b < c ? b : c);
m = double(y * y) + double(z * z) - double(x * x);
if (x < y + z) {
	if (m == 0) { cout << "Right triangle\n"; }
	if (m > 0) { cout << "Acute triangle\n"; }
	if (m < 0) { cout << "Obtuse triangle\n"; }
	if (x==y||y==z) { cout << "Isosceles triangle\n"; }
	if (x==y&&y==z) { cout << "Equilateral triangle\n"; }
}else cout << "Not triangle\n";

cin.get();
cin.get();
cin.get();

return 0;

}