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: lQwpMQRxuVbJDv, UkzwpMQRxuDVT

Answer: wpMQRxu


Question: cjDuPZOHjystHnF, okWVdUDuPZOHjSCaEecP

Answer: DuPZOHj


Question: DrfvhuWiUxSJ, uGSvhuWiUxCz

Answer:
vhuWiUx