#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using namespace atcoder;
using ll=long long;
using ld=long double;
ld pie=3.141592653589793;
ll inf=144499999999994;
ll mod=1000000007;
int main(){
    string s;
    cin >> s;
    map<char,ll>memo;
    vector<ll>kaijo(10,1);
    for (ll i = 2; i < 10; i++)
    {
        kaijo[i]=kaijo[i-1]*i;
    }
    ll ans=kaijo[s.size()];
    for (ll i = 0; i < s.size(); i++)
    {
        memo[s[i]]+=1;
    }
    for(auto v:memo){
        ans/=kaijo[v.second];
    }
    cout << ans-1 << endl;
}