#include <bits/stdc++.h>

using namespace std;

int main() {
	int a1, b1, a2, b2, a3, b3;
	cin >> a1 >> b1 >> a2 >> b2 >> a3 >> b3;

	int odd = (a1%2 != 0) + (a2%2 != 0) + (a3%2 != 0);

	if (odd != 1 && odd != 3) {
		puts(":-)");
	} else {
		puts(":-(");
	}

	return 0;
}