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

#define int long long

signed main(){
    int a[3], b[3];

    for(int i = 0;i < 3;i++) cin >> a[i] >> b[i];

    int tmp = a[0] + a[1] + a[2];

    cout << (tmp % 2 == 0 ? ":-)" : ":-(") << endl;

    return 0;
}