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