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

[Q]: yxJxNRLEnKGHziJtfb, KfReWhEnKGHzitzfPWzK
[A]: EnKGHzi


[Q]: RGImMTISYdkjzMO, pmyfpImMTISYdatLBBFr
[A]: ImMTISYd


[Q]: rVzoDpQk, UkqoDpmZM
[A]:
oDp