#include <iostream>
using namespace std;
int main(void) {
	int a, b, 
		odd = 0;
	for (int i = 0; i < 3; ++i) {
		cin >> a >> b;
		if (a % 2 == 1) ++odd;
	}
	if (odd == 1 || odd == 3) cout << ":-(" << endl;
	else cout << ":-)" << endl;
	return 0;
}