#include <vector>
#include <cmath>
#include <string.h>
#include <iostream>
#include <algorithm>
#include <string>
using namespace std;
long long factorial(long long n)
{
	if (n == 0) {
		return 1;
	}
	return n * factorial(n - 1);
}
int main()
{
	long long  num = 0, same = 1;
	string s;
	cin >> s;
	vector <int> a(26);
	for (int i = 0; i < s.size(); ++i) {
		num = s[i];
		a[num - 97]++;
	}
	for (int i = 0; i < 26; ++i) {
		if (a[i] != 0) {
			same *= factorial(a[i]);
		}
	}
	cout << factorial(s.size()) / same;
}