import java.util.*; public class Main { public static void main(String[] args) { Scanner sc=new Scanner(System.in); String a = sc.next(); HashMap<Character, Integer> set = new HashMap<>(); int waa=1; for(int i=1;i<=a.length();i++){ waa*=i; } for(int i=0;i<a.length();i++){ if(set.get(a.charAt(i))==null) { set.put(a.charAt(i),0); } set.put(a.charAt(i),set.get(a.charAt(i))+1); } for (Character string : set.keySet()) { for(int i=1;i<=set.get(string);i++){ waa/=i; } } System.out.println(waa-1); } }