using System;

class ABBA
{
    static int Factorial(int n)
    {
    if (n == 1) return 1;
    return n * Factorial(n - 1);
    }

    public static void Main()
    {
    System.Console.WriteLine("ABBA");
    System.Console.Write("Enter number of Vowels:");
    string s = Console.ReadLine();
    int vowels = int.Parse(s);

    System.Console.Write("Enter number of Consonants:");
    s = System.Console.ReadLine();
    int consonants = int.Parse(s);

    Console.WriteLine(Factorial(vowels) * Factorial(consonants));
    }
}