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

[Q]: hCRsCCOoLMpjXwI, lVRCOoLMpxaYFbY
[A]: COoLMp


[Q]: VTwtMVKmrRvL, WLoVtWtMVKmrDCke
[A]: tMVKmr


[Q]: XxlmNjLd, GSDlmNjnRUA
[A]:
lmNj