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

Q: SJIkEibGrqcrOBgGjYjJc, EervOGrqcrOBgGJZyx

A: GrqcrOBgG
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Q: oiNEYHxbvAb, bcDDdEYHxbCREd

A: EYHxb
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Q: pBDnbfrAxJfVhPBxheXZGp, LMtorAxJfVhPnnaed

A:
rAxJfVhP
****