#include <bits/stdc++.h>

using namespace std;

int main() {
  int ans = 0;
  for (int i = 0; i < 3; ++i) {
    int a, b;
    cin >> a >> b;
    if (a % 2 == 0) {
      ans += 2;
    } else {
      ans += 1;
    }
  }

  cout << (ans % 2 == 0? ":-)": ":-(") << '\n';
  return 0;
}