#include <bits/stdc++.h>
#include<iostream>
#include<iomanip>
#include<string>
#include<algorithm>
#include<vector>
#include<set>
#include<list>
#include<queue>
#include<math.h>
#include<bitset>
using ll = long long;
using namespace std;


int main(){
    string s;
    cin >> s;
    sort(s.begin(), s.end());
    set<string> st;
    do{
       st.insert(s);
    }while(next_permutation(s.begin(), s.end()));
    cout << st.size() - 1 << endl;
}