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

Q: OBzHWjmkcgVGPyv, gCHWjmkcgVMq

A: HWjmkcgV
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Q: YPeBvuJXaSLLPhKpUQ, ryjPdyuJXaSLLPhIzBeJP

A: uJXaSLLPh
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Q: jyJrDIhxJtWbnooEXZ, uyXifNCIhxJtWbnVCUrt

A:
IhxJtWbn
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