using System;
class ABBA
{
static int Factorial(int n)
{
if (n == 1) return 1;
return n * Factorial(n - 1);
}
static void Main(string[] args)
{
Console.WriteLine("ABBA!");
Console.Write("Enter number of vowels: ");
int vowels = int.Parse(Console.ReadLine());
Console.Write("Enter number of consonants: ");
int consonants = int.Parse(Console.ReadLine());
Console.WriteLine(Factorial(vowels) * Factorial(consonants));
}
}