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designer-door-mat.py
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'''
problem--
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----------
---.|..|..|..|..|..|..|.---
------.|..|..|..|..|.------
---------.|..|..|.---------
------------.|.------------
'''
#code is here
n,m=map(int,input().split())
for i in range(1,n//2+1):
print(('.|.'*(2*i-1)).center(m,'-'))
print('WELCOME'.center(m,'-'))
for i in range(n//2,0,-1):
print(('.|.'*(2*i-1)).center(m,'-'))