fn zalgorithm(s: &str) -> Vec<usize> {
    let n = s.len();
    let svec = s.chars().collect::<Vec<_>>();
    let mut ret = vec![0usize; n];
    ret[0] = n;
    let mut i = 1usize;
    let mut j = 0usize;
    while i < n {
        while i+j < n && svec[j] == svec[i+j] {
            j += 1;
        }
        ret[i] = j;

        if j == 0 {
            i += 1;
            continue;
        }
        let mut k = 1usize;
        while k < j && k + ret[k] < j {
            ret[i+k] = ret[k];
            k += 1;
        }
        i += k;
        j -= k;
    }
    ret
}

fn dfs(target: &str) -> usize {
    if target.is_empty() {
        return 0usize;
    }
    let n = target.len();
    let mut ret = 1usize;
    let dists = zalgorithm(target);
    for size in 1..=n/2 {
        if dists[n-size] == size {
            ret += dfs(&target[size..n-size]);
        }
    }
    ret
}

fn main() {
    let mut s = String::new();
    std::io::stdin().read_line(&mut s).ok();
    let s = s.trim();

    println!("{}", dfs(s));
}