#include <bits/stdc++.h>

using namespace std;

using ll =  long long;
using Pll = pair<ll, ll>;
using Pii = pair<int, int>;

constexpr ll MOD = 1000000007;
constexpr long double EPS = 1e-10;
constexpr int dyx[4][2] = {
    { 0, 1}, {-1, 0}, {0,-1}, {1, 0}
};

int main() {
    ios::sync_with_stdio(false); cin.tie(nullptr);
    ll a[3], b[3];
    bool ok = true;
    for(int i=0;i<3;++i){
        cin >> a[i] >> b[i];
        if(a[i] % 2) ok = ok^true;
    }

    cout << (ok?":-)":":-(") << endl;
}