using System.Numerics;

public class Program
{
    public static void Main()
    {
        //int num = int.Parse(Console.ReadLine() ?? string.Empty);
        string[] str = (Console.ReadLine() ?? string.Empty).Trim().Split(' ');
        //string str = Console.ReadLine() ?? string.Empty;


        double a =Math.Pow( int.Parse(str[0]),int.Parse(str[1]));
        double b = Math.Pow(int.Parse(str[2]) , int.Parse(str[3]));
        double  c = Math.Pow(int.Parse(str[4]) , int.Parse(str[5]));
        double total = a + b + c;

        if (total % 2 == 0)
        {
            Console.WriteLine(":-)");
        }
        else
        {
            Console.WriteLine(":-(");
        }


    }
}