#include <bits/stdc++.h>

using namespace std;

#define int int64_t

const int inf = 2e18;
const int mod = 1e9 + 7;

int F[10];
int f[10];
int ans = 0;
int fact[20];

void rec(int i) {
    if (i == 10) {
        int sum = 0;
        for (int j = 0; j < 10; j++) {
            sum += f[j];
        }
        int cur = fact[sum];
        for (int j = 0; j < 10; j++) {
            cur /= fact[f[j]];
        }
        ans += cur;
        if (f[0] > 0) {
            cur = fact[sum - 1];
            f[0]--;
            for (int j = 0; j < 10; j++) {
                cur /= fact[f[j]];
            }
            f[0]++;
            ans -= cur;
        }
        return;
    }
    if (F[i] == 0) {
        rec(i + 1);
        return;
    }
    for (int j = 1; j <= F[i]; j++) {
        f[i] = j;
        rec(i + 1);
    }
}

int32_t main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
    fact[0] = 1;
    for (int i = 1; i < 20; i++) {
        fact[i] = fact[i - 1] * i;
    }
    int n;
    cin >> n;
    while (n) {
        F[n % 10]++;
        n /= 10;
    }
    rec(0);
    cout << ans;
}