#include <iostream>
#include <string>
#include <algorithm>
#include <set>
using namespace std;
int main() {
	string S;
	cin>>S;
	sort(S.begin(),S.end());
	set<string> poyo;
	do {
		poyo.insert(S);
	}while(next_permutation(S.begin(),S.end()));
	printf("%d\n",poyo.size()-1);
}