Square Terminal is a credit card terminal for payments. The company is looking to create a new version of the Square Terminal. During the screen selection process, you are asked to print a testing pattern on the screens on the Square Terminal.

For simplicity's sake, you are told that the requirements of this screen is a NxN pixel square (no pun intended), 8 bit depth and only supports grayscale (0,255).  

In order to test the quality and functionality of the screen, you must create a black and white vertical stripe pattern with each stripe being M wide. The first stripe will be black.  


1) Given a pattern of size N and a stripe width of M, generate the black and white stripe pattern. 


Sample Test Cases (format: size N, width M):
Test1 Input: 2,1
Test1 Output:
0 255
0 255

Test2 Input:  4, 2
Test2 Output:
0 0 255 255
0 0 255 255
0 0 255 255
0 0 255 255

Test3 Input: 7, 1
Test3 Output:
0 255 0 255 0 255 0
0 255 0 255 0 255 0
0 255 0 255 0 255 0
0 255 0 255 0 255 0
0 255 0 255 0 255 0
0 255 0 255 0 255 0
0 255 0 255 0 255 0