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

Answer: MMLGfNHV


Question: inquDFuJxtBaaFGCaRzO, NYcnWDuDFuJxtBafxZWCUw

Answer: uDFuJxtBa


Question: NipPeBHqvoUZ, NtBcuBHqvolo

Answer:
BHqvo