#include <iostream>
#include <vector>
#include <algorithm>

using namespace std;

int main() {
    int odd = 0;
    for (int i = 0; i < 3; i++) {
        int a, b;
        cin >> a >> b;
        odd += a % 2;
    }

    cout << (odd % 2 == 0 ? ":-)" : ":-(") << endl;
    return 0;
}