#include <iostream>
#include <string>

using namespace std;

int main()
{
    int Tapioca[6];
    for(int i=0; i<6; i++) cin >> Tapioca[i];
    
    if((Tapioca[0]+Tapioca[2]+Tapioca[4])%2==0) cout << ":-)" << endl;
    else cout << ":-(" << endl;
}