#include<iostream>
#include<algorithm>
#include <vector>
#include<cmath>
#include<iomanip>
#include<queue>
using namespace std;
typedef long long int lint;
int main() {
	lint a1, b1, a2, b2, a3, b3;
	cin >> a1 >> b1 >> a2 >> b2 >> a3 >> b3;
	if ((a1 + a2 + a3) % 2) {
		cout << ":-(" << endl;
	}
	else {
		cout << ":-)" << endl;
	}
}