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

Q: YCAyruPTTHWhCYaiXfIl, OETdzqAyruPTTHWgS

A: AyruPTTHW
****
Q: lypuwWy, jRpuwcE

A: puw
****
Q: DOMfMjlqNoeWjvlXJ, pIOLgXhQMjlqNoeWjywv

A:
MjlqNoeWj
****