#include <bits/stdc++.h>
using namespace std;
const long long mod = 1e9 + 7;
long long dx[] = {-1, 0, 1, 0};
long long dy[] = {0, -1, 0, 1};
vector<long long> v(10);
string s;
set<string> st;
void call(string s, long long pos) {
  if (pos == 10) {
    sort(s.begin(), s.end());
    st.insert(s);
    return;
  }
  if (v[pos] == 0) {
    call(s, pos + 1);
    return;
  }
  for (long long i = 1; i <= v[pos]; i++) {
    char c = '0' + pos;
    string x = string(i, c);
    call(s + x, pos + 1);
  }
}
int32_t main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  cout.tie(0);
  vector<long long> f(20);
  f[0] = f[1] = 1;
  for (long long i = 2; i < 20; i++) {
    f[i] = f[i - 1] * i;
  }
  cin >> s;
  for (long long i = 0; i < s.size(); i++) v[s[i] - '0']++;
  string x = "";
  call(x, 0);
  long long ans = 0;
  for (auto i : st) {
    string &x = i;
    vector<long long> cnt(10);
    for (long long i = 0; i < x.size(); i++) {
      cnt[x[i] - '0']++;
    }
    long long val = f[x.size()];
    for (long long i = 0; i < 10; i++) {
      val = val / f[cnt[i]];
    }
    ans += val;
    if (v[0] > 0) {
      long long val1 = f[x.size() - 1];
      cnt[0]--;
      for (long long i = 0; i < 10; i++) val1 = val1 / f[cnt[i]];
      ans -= val1;
    }
  }
  cout << ans << "\n";
}
