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

CxwZWv, mkwZgM
wZ

YCAyruPTTHWhCYaiXfIl, OETdzqAyruPTTHWgS
AyruPTTHW

oVcLcSXPuaI, qMcSXPiCFM

cSXP