#include <iostream>
#include <set>

using namespace std;

string S;

void dfs(const string& S, set<string>* str_set, int l, int r, const string& cur) {
	if (l == r) {
		str_set->insert(cur + S[l]);
	} else {
		dfs(S, str_set, l + 1, r, cur + S[l]);
		dfs(S, str_set, l, r - 1, cur + S[r]);
	}
}

int main() {
	cin >> S;
	set<string> str_set;
	dfs(S, &str_set, 0, S.length() - 1, "");
	cout << str_set.size() << endl;
	return 0;
}