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

[Q]: OFbCjZDoRRlLsMU, DcCjZDoRRtld
[A]: CjZDoRR


[Q]: sJRFPufsaWXNeu, AePufsafc
[A]: Pufsa


[Q]: ojNOAEQqUOcihjBhtzd, UsiiEQqUOcihTjRoOlA
[A]:
EQqUOcih