import java.util.Scanner;


public class Main_yukicoder170 {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        char[] s = sc.next().toCharArray();

        int[] a = new int[26];
        for (char c : s) {
        	a[c - 'A']++;
        }

        int[] fact = new int[8 + 1];
        fact[0] = 1;
        for (int i = 1; i <= 8; i++) {
        	fact[i] = fact[i - 1] * i;
        }

        int ret = fact[s.length];
        for (int e : a) {
        	ret /= fact[e];
        }

        System.out.println(ret - 1);

        sc.close();
    }
}