#include<bits/stdc++.h>
using namespace std;
using Int = long long;
//INSERT ABOVE HERE
signed main(){
  string s;
  cin>>s;
  set<string> ss;
  sort(s.begin(),s.end());
  do{
    ss.emplace(s);
  }while(next_permutation(s.begin(),s.end()));
  cout<<ss.size()-1<<endl;
  return 0;
}