#include <bits/stdc++.h>
using namespace std;

int main() {
	string S;
	cin >> S;

	int res = 0;
	string T = S;
	
	do {
		++res;
		next_permutation(T.begin(), T.end());
	} while(T != S);

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