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]: ocjsZZfSBBopDtgWUT, rWmgzsZZfSBBoGWQ
[A]: sZZfSBBo


[Q]: BdkWAefaNcQCaoZksYB, EGZxGBDaNcQCaoZKbp
[A]:
aNcQCaoZ