#include <iostream>
#include <string>
using namespace std;

void count(string S, int countList[26]) {
	int n = S.size();
	for (int j = 0; j < n; j++) {
		for (int i = 0; i < 26; i++) {
			if (S[j] == (char)(i+'A')) countList[i]++;
		}
	}
}

int main() {
	string S;
	cin >> S;
	int ans;
	int countList[26] = {};

	int fact[9];
	fact[0] = 1;
	for (int i = 1; i < 9; i++) {
		fact[i] = fact[i-1] * i;
	}

	count(S, countList);

	ans = fact[S.size()];
	for (int i = 0; i < 26; i++) {
		ans /= fact[countList[i]];
	}
	ans--;

	cout << ans << endl;

	return 0;
}