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 (GCC 5.4.1) (judge verdict: Wrong Answer)

/* ex6_2
   key_tree */

#include <stdio.h>
// 文字列操作に関する関数が定義されたヘッダファイル
#include <string.h>
// 文字列の長さ制限
#define SIZE 101

int main(void){
    int length;
    char message[SIZE];
    // 文字列を取得し、配列に格納
    fgets(message, SIZE, stdin);
    // 文字列の長さ
    length = strlen(message);
    // 文字列の最後にnull文字があることに注意して、題意の略字を求める
    printf("%c%d%c\n", message[0], length - 2, message[length - 1]);

    return 0;
}