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 C# (Mono 4.6.2.0) (judge verdict: Accepted)

using System;
using System.Collections.Generic;
using System.Linq;

namespace kakomon
{
    class Program
    {
        static void Main(string[] args)
        {
            abc069_b();
        }


        static void abc069_b()
        {
            // B - i18n
            string S = Console.ReadLine().Trim();
            int len = S.Length;
            string head = S.Substring(0, 1);  // 最初の1文字
            string tail = S.Substring(len - 1);  // 最後の1文字
            string ans = head + (len - 2).ToString() + tail;
            Console.WriteLine(ans);
        }
    }
}