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

Q: BICndZkjoSidWivWATvtqsS, FzVWjoSidWivFaQhkRT

A: joSidWiv
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Q: CuizrSvJTRWZK, udyrSvJTRZzkS

A: rSvJTR
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Q: UsUtwMUWDwTKesLerQ, xvXzAdLWDwTKesLoQCUzS

A:
WDwTKesL
****