#include <iostream>
int main()
{
int side_a = 15, side_b = 16, side_c = 17;
if (side_a == side_b && side_b == side_c) {
std::cout << "Equilateral triangle";
}
else if (side_a == side_b || side_a == side_c || side_b == side_c) {
std::cout << "Isosceles triangle";
}
else {
std::cout << "Scalene triangle";
}
}
/*
run:
Scalene triangle
*/