#include "bits/stdc++.h"
#define rep(i,n) for(int i=0;i<n;i++)
using namespace std;

using ll = long long;
const ll MOD = 1e9 + 7;

int main() {
    int A1, B1, A2, B2, A3, B3;
    cin >> A1 >> B1 >> A2 >> B2 >> A3 >> B3;
    if ((A1 + A2 + A3) % 2 == 0) cout << ":-)" << endl;
    else cout << ":-(" << endl;
}