#include "bits/stdc++.h"

using namespace std;

void solve()
{
    int a, b;
    int f = 1;
    for (int i = 0; i < 3; i++)
    {
        cin >> a >> b;
        if (a & 1)
            f = 0;
    }
    cout << (f ? ":-)" : ":-(") << endl;
}

int main()
{
    solve();
    return 0;
}