class Program
{
    static void Main(string[] args)
    {
        string[] input = Console.ReadLine()!.Split(' ');
        int left1 = int.Parse(input[0]);
        int right1 = int.Parse(input[1]);
        int left2 = int.Parse(input[2]);
        int right2 = int.Parse(input[3]);
        int left3 = int.Parse(input[4]);
        int right3 = int.Parse(input[5]);

        double num1 = Math.Pow(left1, right1);
        double num2 = Math.Pow(left2, right2);
        double num3 = Math.Pow(left3, right3);

        if ((num1 +  num2 + num3) % 2 == 0)
        {
            Console.WriteLine(":-)");
        }
        else
        {
            Console.WriteLine(":-(");
        }
    }
}