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

[Q]: cKsJcqYvZO, UrsJcqBC
[A]: sJcq


[Q]: rRmkmETbjzCzZZxihrVdefxfcenJ, ogQtzAgWjKCzZZxihrVdRswMCmngp
[A]: CzZZxihrVd


[Q]: LciiKuLPowk, EzQvaLiKuLPoJHBC
[A]:
iKuLPo