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: UldKHMpUYADGfEUGcSon, nPHMpUYADGfEKqHCLPmL

Answer: HMpUYADGfE


Question: biAihydBoNlzR, IAloNhydBolwUz

Answer: hydBo


Question: dKjDhzQQaHiLj, HuDhzQQwubVn

Answer:
DhzQQ