#include <iostream>
#include <iomanip>
#include <sstream>
#include <string>
#include <cmath>
#include <iostream>
#include <algorithm>
using namespace std;

int main() {
	string in = "";
	cin >> in;
	string s = "";
	int count[8] = {0};

	for (int i = 0;i < (int)in.length();i++){
		string p = in.substr(i,1);
		std::string::size_type loc = s.find(p);
		if (loc == string::npos){
			s += p;
			count[s.length() -1]++;
		}else{
			count[loc]++;
		}
	}

	long long pat;
	pat = 1;

	for (int i=1;i <= (int)in.length();i++){
		pat *= i;
	}

	for (int i = 0;i < (int)s.length();i++){
		for (int j=1;j <= count[i];j++){
			pat /= j;
		}
	}
	pat--;

	cout << pat << endl;
	return 0;
}