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

int main() {
    cin.tie(0);
    ios::sync_with_stdio(false);
    
    int n[6];
    bool judge;
    for(int i = 0; i < 6; i++) {
        cin >> n[i];
        if((n[0] + n[2] + n[4]) % 2 == 0) {
            judge = true;
        }else {
            judge = false;
        }
    }
    if(judge) {
        cout << ":-)" << endl;
    }else {
        cout << ":-(" << endl;
    }
}