#include<iostream>
#include<string>

using namespace std;

int main() {
	string s[8], ss;
	int i, j, l, n[8], f[8], a, ll, nn[8], nnn;

	cin >> ss;
	l = ss.length();
	
	for (i = 0; i < l; i++) {
		s[i] = ss[i];
	}//1文字づつに

	for (i = 0; i < 8; i++) {
		f[i] = 0;
		n[i] = 1;
		nn[i] = 1;
	}

	for (i = 0; i < l; i++) {
		for (j = 0; j < l; j++) {
			if (i == j) j++;
			if (j == 8) break;
			if (s[i] == s[j] && f[j] == 0){
				n[i]++;
				f[j]++;
			}
		}
		f[i]++;
	}


	//l!
	ll = 1;
	for (i = 1; i <= l; i++) {
		 ll *= i;
	}

	//n!
	for (i = 0; i < l; i++) {
		for (j = 1; j <= n[i]; j++) {
			nn[i] *= j;
		}
	}
	
	nnn = 1;
	for (i = 0; i < 8; i++) {
		nnn *= nn[i];
		//cout << nn[i] << endl;
	}
	
	a = ll / nnn - 1;

	cout << a << endl;
	
	return 0;

}