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

int main() {
	int sum = 0;
	for (int i = 0; i < 3; i++) {
		int a, b;
		cin >> a >> b;

		int n = 1;
		for (int j = 0; j < b; j++) {
			n *= a;
		}

		sum += n;
	}

	if (!(sum % 2)) {
		cout << ":-)" << endl;
	}
	else {
		cout << ":-(" << endl;
	}
}