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

Q: XYnCjAWPHHJ, gmCjAWPHpmwVsm

A: CjAWPH
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Q: ptVlCwpfOZIi, QEdyVlCwpfOwp

A: VlCwpfO
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Q: MIQCgWlEXmbEKopYeXCDL, XJZLmDXRnqXmbEKopYeXQF

A:
XmbEKopYeX
****