import java.util.*;
import java.lang.*;
import java.io.*;

class Ideone
{
    static int fact(int n)
     {
      if (n == 0)
        return 1;
      else
        return n * fact(n-1);
    }

    public static void main (String[] args) throws java.lang.Exception
    {
       BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
       String str;
       str = br.readLine();

        char[] a=str.toCharArray();
        Arrays.sort(a);
        int count=0,m=0,size,no;
        char c;
        size=str.length();
        no=fact(size);

        while(m<size){
        c=a[m];
        count=0;
        while(c==a[m]){
           if(c==a[m])
              count++;
           else break;
        if(m==size-1) break;
        m++;
       }
    if(count>1)
        no=no/fact(count);

   }
   System.out.print(no);
}