const MOD: usize = 1e9 as usize + 7;

fn dfs(idx: usize, s: &str, memo: &mut Vec<Option<usize>>) -> usize {
    if memo[idx].is_some() {
        return memo[idx].unwrap();
    }
    let n = s.len();
    if idx >= (n+1) / 2 {
        return 1;
    }
    let mut ret = 1usize;
    for size in 1.. {
        if idx+size > n-idx-size { break; }
        if s[idx..idx+size] == s[n-idx-size..n-idx] {
            ret += dfs(idx+size, s, memo);
            ret %= MOD;
        }
    }
    memo[idx] = Some(ret);
    ret
}

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

    let n = s.len();
    let mut memo = vec![None; n+1];
    println!("{}", dfs(0, s, &mut memo));
}