#include <iostream>
#include <vector>
#include <algorithm>
#include <map>
#include <string>
using namespace std;



int main() {
	string s;
	int nu[30] = {0};
	int kai[] = { 1,1,2,6,24,120,720,5040,40320 };

	cin >> s;
	for (int i = 0; i < s.length(); i++) {
		nu[s[i] - 'A']++;
	
	}
	int l = s.length();
	int ans = 1;
	for (int i = 0; i < 26; i++) {
	
		ans = ans*kai[l] / kai[nu[i]] / kai[l - nu[i]];
		l = l - nu[i];
	
	}

	cout << ans - 1 << endl;
	return 0;
}