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: XEvxzelZaWRO, zXIelZaWBUn

Answer: elZaW


Question: QjDQjzAIsnYgNmmetl, vyqDQjzAIsnNajYEheP

Answer: DQjzAIsn


Question: eDAoGowkOYZnXemasjbRh, liBGowkOYZnXiyGw

Answer:
GowkOYZnX