// yukicoder No.892
#include <bits/stdc++.h>
using namespace std;

int main()
{
  int a, b, m, n, x, y; cin >> a >> b >> m >> n >> x >> y;
 
  int tmp = a + m + x;

  if(tmp % 2 == 0) cout << ":-)" << "\n";
  else cout << ":-(" << "\n";

  return 0;
}