#include <iostream>
#include <vector>
#include <algorithm>
#include <cmath>
#include <queue>
#include <string>
#include <map>
#include <set>
#include <stack>
#include <tuple>
#include <deque>
#include <numeric>
#include <bitset>
#include <iomanip>
#include <cassert>
#include <chrono>
#include <random>
#include <limits>
#include <iterator>
#include <functional>
#include <sstream>
#include <complex>
using namespace std;

#define chmax(x, y) x = max(x, y)
#define chmin(x, y) x = min(x, y)

typedef long long ll;
typedef uint64_t ull;
typedef pair<int, int> P;
typedef pair<int, double> Pid;
typedef pair<double, int> Pdi;
typedef pair<ll, int> Pl;
typedef pair<ll, ll> Pll;
typedef pair<int, pair<int, int>> PP;
typedef pair<P, int> PPi;
constexpr double PI = 3.1415926535897932;   // acos(-1)
constexpr double EPS = 1e-9;
constexpr int INF = 1001001001;
constexpr int mod = 1e+9 + 7;
// constexpr int mod = 998244353;

int pow(ll x, int n, int m){
    int res = 1;
    while(n > 0){
        if(n & 1)   res = res * x % m;
        x = x * x % m;
        n >>= 1;
    }
    return res;
}
int main(){
    ios::sync_with_stdio(false);
    cin.tie(nullptr);

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