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

int main() {
	int ans = 0;
	string s;
	vector<string> tmp;
	cin >> s;
	sort(s.begin(), s.end());
	tmp.push_back(s);
	while (next_permutation(s.begin(), s.end())) tmp.push_back(s);
	sort(tmp.begin(), tmp.end());
	for (size_t i = 1; i < tmp.size(); ++i) if (tmp[i - 1] != tmp[i]) ++ans;
	cout << ans;
}