#define _USE_MATH_DEFINES
#include <cstdio>
#include <iostream>
#include <sstream>
#include <fstream>
#include <iomanip>
#include <algorithm>
#include <cmath>
#include <complex>
#include <string>
#include <vector>
#include <array>
#include <list>
#include <queue>
#include <stack>
#include <set>
#include <map>
#include <bitset>
#include <numeric>
#include <limits>
#include <climits>
#include <cfloat>
#include <functional>
#include <iterator>
#include <memory>
#include <regex>
using namespace std;

int main()
{
    vector<int> a(3), b(3);
    for(int i=0; i<3; ++i)
        cin >> a[i] >> b[i];

    int x = a[0] + a[1] + a[2];
    if(x % 2 == 0)
        cout << ":-)" << endl;
    else
        cout << ":-(" << endl;

    return 0;
}