#define _USE_MATH_DEFINES
#include  <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
#include <string>
#include<math.h>
#include<iomanip>
#include<stdio.h>
#include <stdlib.h>
#include<stdio.h>
#include <queue>
#include<map>
#include <fstream>
#include <sstream>
#include<set>
#include<stack>
#include<time.h>
#include <sys/types.h>
#include <tuple>
#include <numeric>
#include <iterator>

typedef long long int ll;
//#include<bits/stdc++.h>


using namespace std;

int gcd(int a, int b) {
    if (a < b)swap(a, b);
    if (b == 0)return a;
    return gcd(b, a % b);
}
int lcm(int a, int b) {
    return a * b / gcd(a, b);
}


int main()
{

    int Q;
    Q = 1;
    //cin >> Q;


    while (Q--) {
        
        string s;
        cin >> s;
        map<char, int>mp;
        ll a =1;
        int n = s.size();
        for (int i = 0; i < s.size(); i++) {
            mp[s[i]]++;
        }

        for (char i = 'A'; i <= 'Z'; i++) {
            if (!mp[i])continue;
            ll x = 1;
            for (int j = 0; j < mp[i]; j++) {
                x *= (n-j);
            }
            for (int j = 0; j < mp[i]; j++) {
                x /= (j + 1);
            }
            a *= x;
            n -= mp[i];
        }
        cout << a-1;
       
    }
    return 0;
}