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

int main() {
    long a, b, c, d, e, f;
    cin >> a >> b >> c >> d >> e >> f;
    if ((a + c + e) % 2 == 0) {
        cout << ":-)" << endl;
    } else {
        cout << ":-(" << endl;
    }
}