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)

mod reader {
    use std::fmt::Debug;
    use std::str::FromStr;
    use std::collections::VecDeque;
    use std::io::{self, Read};

    fn _read_line() -> String {
        let mut buf = String::new();
        io::stdin().read_to_string(&mut buf);
        buf
    }

    fn _read_vec_deque_string() -> VecDeque<String> {
        _read_line().split_whitespace().map(|s| s.to_string()).collect()
    }

    pub struct Reader {
        buf: VecDeque<String>
    }

    impl Reader {
        pub fn new() -> Reader {
            Reader {buf: VecDeque::new()}
        }

        fn update_buf(&mut self) {
            if self.buf.is_empty() {
                self.buf = _read_vec_deque_string();
            }
        }

        pub fn next<T>(&mut self) -> T where T: FromStr, T::Err: Debug {
            self.update_buf();
            self.buf.pop_front().unwrap().parse::<T>().unwrap()
        }

        pub fn nextN<T>(&mut self, n: usize) -> Vec<T> where T: FromStr, T::Err: Debug {
            let mut vec: Vec<T> = Vec::with_capacity(n);
            for i in 0..n {
                vec.push(self.next());
            }
            vec
        }
    }
}

fn main() {
    let mut reader = reader::Reader::new();
 
    let h: usize = reader.next();
    let w: usize = reader.next();
 
    let a: Vec<String> = reader.nextN(h);
 
    for i in 0..w+2 {
        print!("#");
    }
    print!("\n");
    for s in a {
        println!("#{}#", s);
    }
    for i in 0..w+2 {
        print!("#");
    }
    print!("\n");
}