#include <algorithm>
#include <cmath>
#include <cstdio>
#include <deque>
#include <iostream>
#include <map>
#include <numeric>
#include <queue>
#include <set>
#include <stack>
#include <string>
#include <vector>

using namespace std;

typedef long long ll;

#define MOD 1000000007

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;
  return 0;
}