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

Answer: EuutntEB


Question: goyZUz, QryZlD

Answer: yZ


Question: uugqdKwoAuyKBtk, VTELqdKwoAlsrGk

Answer:
qdKwoA