use std::io::*;

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

    let target = "abcdefghijklmnopqrstuvwxyz".chars().collect::<Vec<char>>();

    for i in 0..target.len() {
        if s[i] != target[i] {
            println!("{}to{}", target[i], s[i])
        }
    }
}