#include <iostream>
using namespace std;

int main() {
    int a1, b1, a2, b2, a3, b3;
    cin >> a1 >> b1 >> a2 >> b2 >> a3 >> b3;
    if ((a1 + a2 + a3) % 2 == 0) cout << ":-)";
    else cout << ":-(";
    cout << endl;
    return 0;
}