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

Q: DQVkAbWTTPhoBx, TeWTTPhonxcIKL

A: WTTPho
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Q: bUHPpvVtFQNSpUdg, zggEFoKBHPpvVtFQNHXsc

A: HPpvVtFQN
****
Q: UHiqqEIxVOS, luPDJpiqqEIxNOzwWe

A:
iqqEIx
****