#include <assert.h>
#include <limits.h>
#include <algorithm>
#include <bitset>
#include <cctype>
#include <cmath>
#include <complex>
#include <deque>
#include <functional>
#include <iomanip>
#include <iostream>
#include <map>
#include <numeric>
#include <queue>
#include <set>
#include <stack>
#include <string>
#include <unordered_map>
#include <vector>

using ll = long long;
using P = std::pair<ll, ll>;

template <typename T1, typename T2>
std::ostream& operator<<(std::ostream& os, std::pair<T1, T2> pa) {
  return os << "[" << pa.first << ", " << pa.second << "]";
}

template <typename T>
std::ostream& operator<<(std::ostream& os, std::vector<T> vec) {
  os << "{";
  for (int i = 0; i < vec.size(); i++)
    os << vec[i] << (i + 1 == vec.size() ? "" : ", ");
  os << "}";
  return os;
}

#define rep(i, a, b) for (ll(i) = (a); i < (b); i++)
#define all(i) i.begin(), i.end()
#define debug(i) std::cerr << "debug " << i << std::endl

// const ll MOD = 998244353;
const ll MOD = 1e9 + 7;

int main() {
  std::cin.tie(0);
  std::ios::sync_with_stdio(false);

  ll a,b,sum=0;
  rep(i,0,3){
    std::cin>>a>>b;
    if(b==0){
      sum+=1;
    }else{
      sum+=(a%2);
    }
  }

  if(sum%2==0)std::cout<<":-)\n";
  else std::cout<<":-(\n";

  return 0;
}