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

int main(){
    int a, s, d, f, g, h;
    cin >> a >> s >> d >> f >> g >> h;
    
    int b = (a + d + g)%2;
    
    if(b == 0) cout << ":-)" << endl;
    
    else cout << ":-(" << endl;
}