#include <bits/stdc++.h>
#define rep(i, ss, ee) for (int i = ss; i < ee; ++i)
using namespace std;

void solve() {
  int a, b;
  bool c = false;
  rep(i, 0, 3) {
    cin >> a >> b;
    if (a & 1) c = !c;
  }
  cout << ((c) ? ":-(" : ":-)") << endl;
}

int main() {
  cin.tie(0);
  ios::sync_with_stdio(false);
  solve();
}