#include <bits/stdc++.h>

#define rep(i, n) for (int i = 0; i < (n); i++)
#define repr(i, n) for (int i = (n) - 1; i >= 0; i--)
#define range(a) a.begin(), a.end()

using namespace std;
using ll = long long;

int main() {
  cin.tie(nullptr);
  ios::sync_with_stdio(false);
  int A[3], B[3];
  rep(i, 3) cin >> A[i] >> B[i];
  cout << ((A[0] + A[1] + A[2]) % 2 == 0 ? ":-)" : ":-(") << endl;
}