d4e.rs

use std::io;
use std::io::BufRead;

fn main() -> io::Result<()> {
    let mut stdin = io::BufReader::new(io::stdin());
    let mut line = String::new();

    loop {
        line.clear();

        if stdin.read_line(&mut line)? == 0 {
            break;
        }

        for word in line.trim().split(' ').map(|word| {
            let len = word.len();

            if len <= 2 {
                word.to_string()
            } else {
                let mut chars = word.chars();

                let first = chars.next().unwrap();
                let last = chars.last().unwrap();

                format!("{}{}{}", first, len - 2, last)
            }

        }) {
            print!("{} ", word);
        }

        println!("");
    }

    Ok(())
}