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-csc 3.5.0) (judge verdict: Accepted)

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using static System.Console;
using static System.Math;
using static System.Array;

class Program
{
    public static void Main()
    {
        var n = ReadLine().Split().Select(int.Parse).ToArray();
        var sb = new StringBuilder();
        for(int i = 0; i < n[1] + 2; i++)
        {
            sb.Append('#');
        }
        sb.Append("\r\n");
        for(int i = 0; i < n[0]; i++)
        {
            sb.Append('#');
            sb.Append(ReadLine());
            sb.Append('#');
            sb.Append("\r\n");
        }
        for(int i = 0; i < n[1] + 2; i++)
        {
            sb.Append('#');
        }
        WriteLine(sb.ToString());
    }
}