#include<bits/stdc++.h>
using namespace std;

constexpr int_fast64_t pow(int_fast64_t a, uint_fast64_t n, const uint_fast64_t MOD) {
	int_fast64_t ret = 1;
	while(n > 0) {
		if(n & 1) {
			ret = ret * a;
			if(ret >= MOD) {
				ret %= static_cast<int_fast64_t>(MOD);
			}
		}
		a = a * a;
		if(a >= MOD) {
			a %= static_cast<int_fast64_t>(MOD);
		}
		n >>= 1ULL;
	}
	return ret;
}

int main() {
	int _2 = 0;
	for(int i = 0; i < 3; ++i) {
		int a, b; cin >> a >> b;
		_2 += pow(a, b, 2);
	}
	_2 %= 2;
	cout << (_2 ? ":-(" : ":-)") << '\n';
	return 0;
}