#include <bits/stdc++.h>
using namespace std;
using lint = long long;
template<class T = int> using V = vector<T>;
template<class T = int> using VV = V< V<T> >;

int main() {
  cin.tie(nullptr); ios::sync_with_stdio(false);
  V<> a(3), b(3); for (int i = 0; i < 3; ++i) cin >> a[i] >> b[i];
  if (a[0] + a[1] + a[2] & 1) {
    cout << ":-(" << '\n';
  } else {
    cout << ":-)" << '\n';
  }
}