Problem:
Score : 200 points

Problem Statement

The word internationalization is sometimes abbreviated to i18n.
This comes from the fact that there are 18 letters between the first i and the last n.

You are given a string s of length at least 3 consisting of lowercase English letters.
Abbreviate s in the same way.

Constraints

3 ≤ |s| ≤ 100 (|s| denotes the length of s.)

s consists of lowercase English letters.

Input

Input is given from Standard Input in the following format:

s

Output

Print the abbreviation of s.

Sample Input 1

internationalization

Sample Output 1

i18n

Sample Input 2

smiles

Sample Output 2

s4s

Sample Input 3

xyz

Sample Output 3

x1z

Solution in Rust (1.15.1) (judge verdict: Accepted)

use std::error::Error;
use std::io;

fn main() {
    if let Err(e) = run() {
        println!("{}", e);
    }
}

fn run() -> Result<(), Box<Error>> {
    let mut s = String::new();
    io::stdin().read_line(&mut s)?;
    let b = s.trim().as_bytes();
    let b1 = String::from_utf8(vec![b[0]]).unwrap();
    let b2 = String::from_utf8(vec![b[b.len()-1]]).unwrap();
    println!("{}{}{}", b1, b.len()-2, b2);
    Ok(())
}