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

[Q]: NUuLSmDjCKcJPc, lGGSLIDjCKcJBo
[A]: DjCKcJ


[Q]: fCGEhfHvcRouHzNw, gtjBkhfHvcRouHee
[A]: hfHvcRouH


[Q]: MaPbEcsDuvpQjIXqK, HDMUjEcsDuvpQTH
[A]:
EcsDuvpQ