#include <algorithm>
#include <iostream>
#include <vector>
using namespace std;

int main() {
    vector<int> cnt(26);
    string s; cin >> s;
    for (char c: s) cnt[c - 'A']++;
    vector<int> fact(9, 1);
    for (int i = 2; i <= 8; i++) fact[i] = fact[i - 1] * i;
    int ans = fact[s.size()];
    for (int i = 0; i < 26; i++) ans /= fact[cnt[i]];
    cout << ans - 1 << endl;
    return 0;
}