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::prelude::*;

fn input<T>() -> T
where
    T: std::str::FromStr,
{
    let stdin = std::io::stdin();
    let token: String = stdin
        .lock()
        .bytes()
        .map(|c| c.unwrap() as char)
        .skip_while(|c| c.is_whitespace())
        .take_while(|c| !c.is_whitespace())
        .collect();
    token.parse().ok().unwrap()
}

fn main() {
    let h: usize = input();
    let w: usize = input();
    let mut a = vec![vec!['#'; w + 2]; h + 2];
    for i in 1..h + 1 {
        let s: Vec<char> = input::<String>().chars().collect();
        for j in 1..w + 1 {
            a[i][j] = s[j - 1];
        }
    }

    let out = std::io::stdout();
    let mut buf = std::io::BufWriter::new(out.lock());
    for i in 0..h + 2 {
        for j in 0..w + 2 {
            write!(buf, "{}", a[i][j]).unwrap();
        }
        writeln!(buf, "").unwrap();
    }
}