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: HiEuutntEBpU, fdkqEuutntEBABdGZRND

Answer: EuutntEB


Question: SJIkEibGrqcrOBgGjYjJc, EervOGrqcrOBgGJZyx

Answer: GrqcrOBgG


Question: zgBZtcTAqiVYSJLDRbJs, dktcTAqiVYSXl

Answer:
tcTAqiVYS