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

[Q]: mjCEUoPmeKbvCgUtUL, SrHtrPmeKbvYpQAVp
[A]: PmeKbv


[Q]: OhMVLbQhBxEaOZY, iDVLbQhBxBiiD
[A]: VLbQhBx


[Q]: miiwbjJpGkpDdcuM, gKJCjJpGkpaOLd
[A]:
jJpGkp