#include "bits/stdc++.h"
using namespace std;

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