#include "bits/stdc++.h"
using namespace std;


int main() {
	string s;
	cin >> s;

	int n = s.length();
	set<string> strs;
	list<char> chs;
	for (int i = 0; i < n; i++) {
		chs.push_back(s[i]);
	}

	for (int bit = 0; bit < (1 << n); bit++) {
		list<char> tmp_chs=chs;

		string str;
		for (int i = 0; i < n; i++) {
			if (bit&(1 << i)) {
				str.push_back(tmp_chs.back());
				tmp_chs.pop_back();
			}
			else {
				str.push_back(tmp_chs.front());
				tmp_chs.pop_front();
			}
		}
		//cout <<" "<< str << endl;
		strs.insert(str);
	}
	for (auto itr = strs.begin(); itr != strs.end(); itr++) {
		//cout << *itr << endl;
	}
	cout << strs.size() << endl;
}