#include <bits/stdc++.h>

using namespace std;
typedef long long ll;
typedef vector<int> VI;
typedef vector<VI> VVI;
typedef vector<ll> VL;
typedef vector<VL> VVL;
typedef pair<int, int> PII;

#define FOR(i, a, n) for (ll i = (ll)a; i < (ll)n; ++i)
#define REP(i, n) FOR(i, 0, n)
#define ALL(x) x.begin(), x.end()
#define MOD 1000000007
#define INF (1LL<<25)     //33554432
#define PI 3.14159265359
#define EPS 1e-12
//#define int ll

signed main(void)
{
  string s;
  cin >> s;

  int c[26] = {0};
  REP(i, s.size()) {
    c[s[i]-'A']++;
  }

  ll func[15];
  func[0] = 1;
  FOR(i, 1, 11) func[i] = func[i-1]*i;

  ll ret = func[(int)s.size()];
  //cout << ret << endl;
  REP(i, 26) {
    ret /= func[c[i]];
  }

  cout << ret-1 << endl;

  return 0;
}