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

[Q]: jJjsASFfCqVV, AkjsASFfBFwPy
[A]: jsASFf


[Q]: zBxuZfJgYrlRSzkmAktO, YNMgYrlRSzklmBOH
[A]: gYrlRSzk


[Q]: BEfPPTqGKWhW, fmTqGKWAc
[A]:
TqGKW