#include <iostream>
#include <vector>
#include <algorithm>
#include <cmath>
#include <iomanip>
#include <stack>
#include <algorithm>
#include <string>
#include <map>
#include <iterator>
#include <set>
#include <queue>

using namespace std;

bool isEven(int n) {
    return n % 2 == 0;
}

int main() {

    long A1, B1, A2, B2, A3, B3;
    cin >> A1 >> B1 >> A2 >> B2 >> A3 >> B3;

    int numOfEven = 0;

    vector<long> vs = {A1, A2, A3};


    for (long v : vs) {
        if (isEven(v)) {
            numOfEven += 1;
        }
    }

    if (numOfEven == 1 or numOfEven == 2) {
        cout << ":-)" << endl;
    } else {
        cout << ":-(" << endl;
    }

    return 0;
}