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;

namespace AtCoder
{
    class Program
    {
        static void Main(string[] args)
        {
            string[] lines = Console.ReadLine().Split(' ');
            int H = int.Parse(lines[0]);
            int W = int.Parse(lines[1]);
            char[,] a = new char[H + 2, W + 2];

            for (int i = 0; i < H + 2; i++)
            {
                for (int j = 0; j < W + 2; j++)
                {
                    a[i, j] = '#';
                }
            }

            for (int i = 0; i < H; i++)
            {
                char[] line = Console.ReadLine().ToCharArray();

                for (int j = 0; j < W; j++)
                {
                    a[i + 1, j + 1] = line[j];
                }
            }

            for (int i = 0; i < H + 2; i++)
            {
                for (int j = 0; j < W + 2; j++)
                {
                    Console.Write(a[i, j]);
                }
                Console.WriteLine();
            }
        }
    }
}