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# (.NET Core 3.1.201) (judge verdict: Accepted)

using System;
using System.Linq;

namespace AtCorder
{
    class Program
    {
        static void Main(string[] args)
        {
            int[] N = new int[2];
            N = Console.ReadLine().Split(' ').Select(int.Parse).ToArray();
            int H = N[0]; int W = N[1];
            string[] gyazo = new string[H];
            for (int i = 0; i < H; i++)
            {
                gyazo[i] = Console.ReadLine();
            }
            for (int i = 0; i < W + 2; i++)
                Console.Write("#");
            Console.WriteLine();
            for (int i = 0; i < H; i++) {
                Console.Write("#" + gyazo[i] + "#");
                Console.WriteLine();
            }
            for (int i = 0; i < W + 2; i++)
                Console.Write("#");
            Console.WriteLine();
        }
    }
}