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

[Q]: QeNePjbLBKbDOuAVTJtXL, xjPVOyPbLBKbDOuDsMSEF
[A]: bLBKbDOu


[Q]: zqwhMdAdXQfQCAmVNaYZm, toYMIwQeadAdXQfQCAmLyheFOv
[A]: dAdXQfQCAm


[Q]: MxonnKELkSrD, WAmonnKEsdnm
[A]:
onnKE