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 Rust (1.15.1) (judge verdict: Accepted)

use std::io;

fn procon_read<T: std::str::FromStr>() ->  Vec<T> {
	let mut buf = String::new();
	io::stdin().read_line(&mut buf).expect("");
	let iter = buf.split_whitespace();
	let mut v: Vec<T> = Vec::new();
	for i in iter {
		v.push(i.parse().ok().unwrap());
	}
	v
}

fn main() {
	let v:Vec<i32> = procon_read();
	let h = v[0];
	let w = v[1];
	let mut p:Vec<Vec<char>> = Vec::new();
	for i in 0..(h+2) {
		p.push(Vec::new());
	}
	let v1 = vec!['#'; (w+2) as usize];
	let v2 = v1.clone();
	p[0] = v2;
	for i in 1..(h+1) {
		p[i as usize].push('#');
		let mut buf = String::new();
		io::stdin().read_line(&mut buf).expect("");
		let v:Vec<char> = buf.trim().chars().collect();
		for j in v {
			p[i as usize].push(j);
		}
		p[i as usize].push('#');
	}
	let v2 = v1.clone();
	p[(h+1) as usize] = v2;
	for i in p {
		for j in i {
			print!("{}", j);
		}
		println!("");
	}
}