public static void Main()
{
string line = Console.ReadLine();
Dictionary<char, int> balls = new Dictionary<char, int>();
for (int i = 0; i < line.Length; i++)
{
if (balls.ContainsKey(line[i]))
{
balls[line[i]]++;
}
else
{
balls.Add(line[i], 1);
}
}
BigInteger allFac = CalcFactorial(line.Length);
foreach (var item in balls)
{
allFac /= CalcFactorial(item.Value);
}
Console.WriteLine(allFac);
}
}