Designer Door Mat

Mr. Vincent works in a door mat manufacturing company. One day, he designed a new door mat with the following specifications:

• Mat size must be NXM. (N is an odd natural number, and M is 3 times N.)
• The design should have ‘WELCOME’ written in the center.
• The design pattern should only use |, . and - characters.

Sample Designs

    Size: 7 x 21 
    ---------.|.---------
    ------.|..|..|.------
    ---.|..|..|..|..|.---
    -------WELCOME-------
    ---.|..|..|..|..|.---
    ------.|..|..|.------
    ---------.|.---------
    
    Size: 11 x 33
    ---------------.|.---------------
    ------------.|..|..|.------------
    ---------.|..|..|..|..|.---------
    ------.|..|..|..|..|..|..|.------
    ---.|..|..|..|..|..|..|..|..|.---
    -------------WELCOME-------------
    ---.|..|..|..|..|..|..|..|..|.---
    ------.|..|..|..|..|..|..|.------
    ---------.|..|..|..|..|.---------
    ------------.|..|..|.------------
    ---------------.|.---------------

Input Format

A single line containing the space separated values of N and M.

Constraints

• 5 < N <101
• 15 < M < 303

Output Format

Output the design pattern.

Sample Input

9 27

Sample Output

------------.|.------------
---------.|..|..|.---------
------.|..|..|..|..|.------
---.|..|..|..|..|..|..|.---
----------WELCOME----------
---.|..|..|..|..|..|..|.---
------.|..|..|..|..|.------
---------.|..|..|.---------
------------.|.------------

Solution Implementation

N, M = map(int, input().split())
for i in range(int(N/2)):
    string = ".|." * (2 * i + 1)
    x = string.center(M, '-')
    print(x)

print("WELCOME".center(M, '-'))

for i in reversed(range(int(N/2))):
    string = ".|." * (2 * i + 1)
    x = string.center(M, '-')
    print(x)