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

[Q]: wkVVZREWhcSCpvCTB, ZQWhcSCpvCDVUY
[A]: WhcSCpvC


[Q]: gWMyioGBRpwcXfr, AOQGBRpwcSccqBE
[A]: GBRpwc


[Q]: veWttfAgZBWwbEIqExIvmH, orfKgZBWwbEIVDFTbe
[A]:
gZBWwbEI