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: PIcbiJj, hedcbiZHF

Answer: cbi


Question: zqwhMdAdXQfQCAmVNaYZm, toYMIwQeadAdXQfQCAmLyheFOv

Answer: dAdXQfQCAm


Question: nfXgsHMNZsTPRRurMfXdkTLGasm, PQtZsTPRRurMfLoFlmqY

Answer:
ZsTPRRurMf