#!/usr/bin/perl

use strict;
use warnings;

my $str = <>;
chomp $str;
my @array = split //, $str;
my $ans = 1;
my $word = length $str;

for(my $i = 1; $i < $word + 1; $i++) {
	$ans *= $i
}

for(my $i = 0; $i < $word - 1; $i++) {
	my $count = 1;
	for(my $j = $i + 1; $j < $word; $j++) {
		if($array[$i] eq $array[$j]) {
			$count++;
		}
	}
	$ans /= $count;
}

$ans--;
print "$ans\n";

exit;