In this task, you are given two strings A, B. Find the longest common substring in the strings A and B.

[Q]: JjEQVKijeyEQ, dwSVKijeywCTvb
[A]: VKijey


[Q]: VXSNlHzkB, EoNlHCiL
[A]: NlH


[Q]: UcBtWSNGOlewddOwOeHHShbER, lAMRQHBOlewddOwOyE
[A]:
OlewddOwO