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

Answer: QDdYwemF


Question: gWMyioGBRpwcXfr, AOQGBRpwcSccqBE

Answer: GBRpwc


Question: hQqQJesT, CqqQJedQf

Answer:
qQJe