#include <iostream>
using namespace std;
int main(){
	int A1, B1, A2, B2, A3, B3;
	cin >> A1 >> B1 >> A2 >> B2 >> A3 >> B3;
	if (((long long) A1 + A2 + A3) % 2 ==0){
		cout << ":-)" << endl;
	} else {
		cout << ":-(" << endl;
	}
}