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

Answer: DsKQ


Question: CwTYJWQbzEZkvcqKn, hBnhJWQbzEZkKmVM

Answer: JWQbzEZk


Question: JWVrfTmABzTQJeeg, qDefTmABzTQmO

Answer:
fTmABzTQ