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

[Q]: WRfFDeZjIcpidmDxtaJcv, XMxWZjIcpidmlKga
[A]: ZjIcpidm


[Q]: BrDGrTD, PBHDGrDw
[A]: DGr


[Q]: NmtixsgbDOyJomNVRSpwDb, taJkifvtoyJomNVRSpwADZk
[A]:
yJomNVRSpw