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

Q: gfXPLNzsyfEotmHL, oJeXPLNzsyJuXP

A: XPLNzsy
****
Q: vFuggVITQuctFG, hdCIWWuuggVITQwr

A: uggVITQ
****
Q: dgpEnjTzArhJlpgHHFyBTy, mlrhJlpgHHFfzgTeAlp

A:
rhJlpgHHF
****