#include <bits/stdc++.h>
using namespace std;
int main()
{
    int a, b, c, d, e, f, cntodd=0;
    cin >> a >> b >> c >> d >> e >> f;
    if(a%2!=0) cntodd++;
    if(c%2!=0) cntodd++;
    if(e%2!=0) cntodd++;
    if(cntodd%2==0) cout << ":-)" <<endl;
    else cout << ":-(" <<endl;
    return 0;
}