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

[Q]: YHLJZrFQ, aSLJZQuo
[A]: LJZ


[Q]: MSxTzCpiJAplpzSvLlNJS, oScCpiJAplpNVrqkn
[A]: CpiJAplp


[Q]: tcRaOfsL, dhaOfwKB
[A]:
aOf