#include <iostream>
using namespace std;

int main() {
  int A1, B1, A2, B2, A3, B3;
  cin >> A1 >> B1 >> A2 >> B2 >> A3 >> B3;
  if ((A1 % 2 + A2 % 2 + A3 % 2) % 2 == 0)
    cout << ":-)" << endl;
  else
    cout << ":-(" << endl;
}