#include <iostream>
#include <algorithm>
#include <map>
using namespace std;
map<string,int> tbl;
int main(){
  string s;
  cin>>s;
  sort(s.begin(),s.end());
  do{
    tbl[s]=1;
  }while(next_permutation(s.begin(),s.end()));
  cout << tbl.size()-1 << endl;
  return 0;
}