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

int main(){
    long long int A1,A2,A3,B1,B2,B3;
    cin >> A1 >> B1 >> A2 >> B2 >> A3 >> B3;
    if((A1+A2+A3)%2==0){
        cout << ":-)" << endl;
    }else{
        cout << ":-(" << endl;
    }
}