#include <bits/stdc++.h>

using namespace std;

int main() {
    int A1, B1, A2, B2, A3, B3;
    cin >> A1 >> B1 >> A2 >> B2 >> A3 >> B3;

    if ((A1 % 2 + A2 % 2 + A3 % 2) % 2 == 0) {
        cout << ":-)" << endl;
    } else {
        cout << ":-(" << endl;
    }
    return 0;
}