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

Q: UTdardKNThdYrGKMqZPeg, mvrThdYrGKMlcCxBtak

A: ThdYrGKM
****
Q: gWMyioGBRpwcXfr, AOQGBRpwcSccqBE

A: GBRpwc
****
Q: tSWgcrTneWrBIF, TKcrTneWrBgWbVWDhh

A:
crTneWrB
****