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

signed main() {
  int A1, B1, A2, B2, A3, B3;
  cin >> A1 >> B1 >> A2 >> B2 >> A3 >> B3;
  
  if( (A1+A2+A3) % 2 == 0 ) cout << ":-)" << endl;
  else cout << ":-(" << endl;
}