use std::collections::HashSet;
use std::io::*;

fn rec(l: usize, r: usize, chs: &mut Vec<char>, s: &Vec<char>, st: &mut HashSet<String>) {
    if l == r {
        let tmp = chs.clone();
        let t: String = tmp.into_iter().collect();
        st.insert(t + &s[l].to_string());
    } else {
        chs.push(s[l]);
        rec(l + 1, r, chs, &s, st);
        chs.pop();
        chs.push(s[r]);
        rec(l, r - 1, chs, &s, st);
        chs.pop();
    }
}

fn main() {
    let mut s: String = String::new();
    std::io::stdin().read_to_string(&mut s).ok();
    let s: Vec<char> = s.trim().chars().collect();

    let mut st = HashSet::new();
    rec(0, s.len() - 1, &mut Vec::new(), &s, &mut st);
    println!("{}", st.len());
}