fn main() {
    let mut s = String::new();
    std::io::stdin().read_line(&mut s).ok();
    let s: Vec<char> = s.trim().chars().collect();
    for i in 0..s.len() - 1 {
        print!("{}", s[i]);
    }
    println!("{}", s[s.len() - 1].to_digit(2).unwrap() ^ 1);
}