#include <iostream>
#include <numeric>
#include <vector>
using namespace std;

int main() {
	vector<int> A(3), B(3);
	for (int i = 0; i < 3; ++i) cin >> A[i] >> B[i];
	if (accumulate(A.begin(), A.end(), 0) % 2) cout << ":-(";
	else cout << ":-)";
}