#include <iostream>
using namespace std;
typedef long long ll;

ll power(int a, int b) {
    if (b == 0) return 1;
    if (b % 2 == 1) return power(a, b/2) * power(a, b/2) * a;
    else return power(a, b/2) * power(a, b/2);
}
int main() {
    int a1, b1, a2, b2, a3, b3;
    cin >> a1 >> b1 >> a2 >> b2 >> a3 >> b3;
    ll sum = 0;
    sum += power(a1, b1) + power(a2, b2) + power(a3, b3);
    if (sum % 2 == 0) cout << ":-)";
    else cout << ":-(";
    cout << endl;
    return 0;
}