#include <bits/stdc++.h>
using namespace std;
#define IOS ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
typedef long long ll;
// Welcome to my source code!

template<class T> inline bool chmin(T& a, T b) { if (a > b) { a = b; return true; } return false; }
template<class T> inline bool chmax(T& a, T b) { if (a < b) { a = b; return true; } return false; }

int main() {
    int a[3], b[3], cnt = 0;
    for (int i = 0; i < 3; i++) {
        cin >> a[i] >> b[i];
        if (a[i] % 2 == 0) cnt++;
    }
    if (cnt == 1 || cnt == 3) cout << ":-)" << endl;
    else cout << ":-(" << endl;
}