#include <bits/stdc++.h>
using namespace std;

#define ll long long
#define rep(i, n) for (int i = 0; i < (n); i++)
#define P pair<int, int>
#define LP pair<ll, ll>


int main() {

  ll a1,b1,a2,b2,a3,b3;
  cin >> a1 >> b1 >> a2 >> b2 >> a3 >> b3;
  if ((a1+a2+a3)%2) cout << ":-(" << endl;
  else cout << ":-)" << endl;


  return 0;
}