#include <cassert>
#include <cctype>
#include <climits>
#include <cmath>
#include <cstdio>
#include <ctime>
#include <map>
#include <queue>
#include <set>
#include <stack>
#include <vector>
#include <iostream>
#include <algorithm>
#include <functional>
#include <numeric>
#include <string>

#define S_SIZE_MAX 8

using namespace std;

int main(void)
{
    string s;
    cin >> s;
    int factorial[S_SIZE_MAX + 1];
    factorial[0] = 1;
    for (int i = 1; i <= S_SIZE_MAX; i++) {
        factorial[i] = i * factorial[i - 1];
    }
    int count[26];
    fill(count, count + 26, 0);
    for (int i = 0; i < s.size(); i++) {
        count[s[i] - 'A']++;
    }
    int ret = factorial[s.size()];
    for (int i = 0; i < 26; i++) {
        ret /= factorial[count[i]];
    }
    ret--;
    cout << ret << endl;
    return 0;
}