#include <iostream>
#include <set>
using namespace std;

string s;

void construct(int f_idx, int r_idx, string str, set<string>& works) {
    if (f_idx > r_idx) {
        works.insert(str);
        return;
    }
    construct(f_idx + 1, r_idx, str + s[f_idx], works);
    construct(f_idx, r_idx - 1, str + s[r_idx], works);
}

int main() {
    cin >> s;

    set<string> works;
    construct(0, s.size() - 1, "", works);

    cout << works.size() << endl;

    return 0;
}