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

[Q]: iupYjFXrrMqWzJSLUSwmEukHc, hqajjWrrMqWzJSLnF
[A]: rrMqWzJSL


[Q]: cKsJcqYvZO, UrsJcqBC
[A]: sJcq


[Q]: EFnNLAXcjjariH, JxNLAXcjms
[A]:
NLAXcj