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


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