#include <bits/stdc++.h>
using namespace std;
#ifdef LOCAL
  #include "settings/debug.cpp"
#else
  #define Debug(...) void(0)
#endif
#define rep(i, n) for (int i = 0; i < (n); ++i)
using ll = long long;
using ull = unsigned long long;

int main() {
  string s;
  cin >> s;
  vector<int> cnt(26, 0);
  for (char c : s) cnt[c - 'A']++;
  vector<ll> fact(14, 1);
  for (int i = 1; i < 14; i++) fact[i] = fact[i - 1] * i;
  ll ans = fact[s.size()];
  for (int i = 0; i < 26; i++) ans /= fact[cnt[i]];
  cout << ans - 1 << endl;
  return 0;
}