using System.Numerics;

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



        string ac = "";

        for (int i  = 0; i < str.Length; i++)
        {
            if (str[i] != ',')
            {
                ac += str[i];
            }
            else
            {
                if(ac != "AC")
                {
                    Console.WriteLine("Failed...");
                    return;
                }
                ac = "";
            }
        }
        if(ac =="AC")
        {
            Console.WriteLine("Done!");
        }
        else
        {
            Console.WriteLine("Failed...");
        }
    }
}