#include <bits/stdc++.h>
using namespace std;
map<string,int> table;
int main(void){
	string s;
	cin >> s;
	sort(s.begin(),s.end());
	do{
		table[s] = 1;
	}while(next_permutation(s.begin(),s.end()));
	cout << table.size() - 1 << endl;
}