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

[Q]: lLxXqKscqizXTO, TqrKscqizutDudo
[A]: Kscqiz


[Q]: wnIFoRQvMMKMAqpCQYncuWUTJs, bPMUKKxYRxQvMMKMAqpCmzAPPMD
[A]: QvMMKMAqpC


[Q]: oWNgByGPMXc, UcAIqNgByGPKTa
[A]:
NgByGP