Problem:
Score : 200 points

Problem Statement

You are given a image with a height of H pixels and a width of W pixels.
Each pixel is represented by a lowercase English letter.
The pixel at the i-th row from the top and j-th column from the left is a_{ij}.

Put a box around this image and output the result. The box should consist of # and have a thickness of 1.

Constraints

1 ≤ H, W ≤ 100

a_{ij} is a lowercase English letter.

Input

Input is given from Standard Input in the following format:

H W
a_{11} ... a_{1W}
:
a_{H1} ... a_{HW}

Output

Print the image surrounded by a box that consists of # and has a thickness of 1.

Sample Input 1

2 3
abc
arc

Sample Output 1

#####
#abc#
#arc#
#####

Sample Input 2

1 1
z

Sample Output 2

###
#z#
###

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

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Console_Cs_Test
{
    class Program
    {
        public static void Main(string[] args)
        {
            string[] line1 = Console.ReadLine().Trim().Split(' ');
            int H = int.Parse(line1[0]);
            int W = int.Parse(line1[1]);
            List<string> list = new List<string>();
            for (int i = 0; i < H; ++i)
            {
                list.Add(Console.ReadLine().Trim());
            }

            // 出力
            string 枠 = "#";
            string 外行 = string.Empty;

            for (int i = 0; i < W + 2; ++i)
            {
                外行 += 枠;
            }

            List<string> resultList = new List<string>();
            resultList.Add(外行);
            foreach (var item in list)
            {
                resultList.Add($"{枠}{item}{枠}");
            }
            resultList.Add(外行);
            foreach (var item in resultList)
            {
                Console.WriteLine(item);
            }
            Console.ReadLine();
        }
    }
}