package main

import (
	"fmt"
)

func fact(n int) int {
	if n == 1 {
		return 1
	} else {
		return n * fact(n - 1)
	}
}

func push_char(str []rune) map[rune]int {
	m := make(map[rune]int)
	for _,c := range str {
		_,ok := m[c]
		if ok {
			m[c] = m[c] +1
		} else {
			m[c] = 1
		}
	}
	return m
}

func main() {
	var str string
	fmt.Scan(&str)
	s2 := []rune(str)

	num := fact(len(s2))
	charmap := push_char(s2)
	for _,v := range charmap {
		num /= fact(v)
	}
	num--

	fmt.Println(num)
}