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

Answer: zISsXK


Question: oUEcuLINTDdvdOne, thzWccuLINTDQfNZwH

Answer: cuLINTD


Question: MvALRGKkpALcKdhTtnm, neMkRGKkpALcKdcaxnXEPxW

Answer:
RGKkpALcKd