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

int main() {
  int A[3], B[3];
  for (int i = 0; i < 3; i++) {
    cin >> A[i] >> B[i];
  }
  int a = 0;
  for (int i = 0; i < 3; i++) {
    if (A[i] & 1) ++a; 
  }
  if (a == 1 || a == 3) cout << ":-(" << endl;
  else cout << ":-)" << endl;
  return 0;
}