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

int main(void){
  string s;
  cin >> s;
  int c[s.length()];
  for(int i = 0; i < s.length(); i++) c[i] = s[i];
  sort(c, c + s.length());
  set<string>ans;
  do{
    string temp = "";
    for(int i = 0; i < s.length(); i++)
      temp += c[i];
    ans.insert(temp);
  }while(next_permutation(c, c + s.length()));
  cout << ans.size() - 1 << endl;
  return 0;
}