fn main() {
    let mut ns = String::new();
    std::io::stdin().read_line(&mut ns).ok();
    let ns: Vec<usize> = ns.trim().split_whitespace().map(|s| s.parse().unwrap()).collect();
    let n = ns[0];
    let mut s = ns[1];

    let mut result = vec![];
    let mut prev = n;
    while s > 0 {
        let minus = prev.min(s);
        s -= minus;
        prev = minus - 1;
        result.push(minus);
    }
    println!("{}", result.len());
    result.reverse();
    let result: Vec<String> = result.into_iter().map(|v| v.to_string()).collect();
    println!("{}", result.join(" "));
}