#include <bits/stdc++.h>

using namespace std;
using i64 = std::int_fast64_t;

template <typename T, typename U>
T powermod(T x, U n, T mod) {
  T res = 1;
  while (n > 0) {
    if (n & 1) res = res * x % mod;
    x = x * x % mod;
    n /= 2;
  }
  return res;
}

int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  i64 res = 0;
  for (int i = 0; i < 3; i++) {
    i64 a, b;
    cin >> a >> b;
    res += powermod(a, b, static_cast<i64>(2));
  }
  cout << (res % 2 == 0 ? ":-)" : ":-(") << '\n';
  return 0;
}