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 OCaml (4.02.3) (judge verdict: Accepted)

open Batteries
open Printf
let () =
  let s = Scanf.scanf "%s " (fun a -> a) in
  
  let i18n str =
    let len = String.length str in
    if len < 3 then failwith "too small" else
    let fst = String.slice ~last:1 str in
    let mid = string_of_int (len-2) in
    let lst = String.slice ~first:(len-1) str in
    fst ^ mid ^ lst
  in

  Printf.printf "%s\n" @@
  i18n s