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

YCAyruPTTHWhCYaiXfIl, OETdzqAyruPTTHWgS
AyruPTTHW

KTAFonizDqCVvucpJWrItdw, rfFonizDqCVvYbGhb
FonizDqCVv

EJYCiGdvr, LwYCiGgO

YCiG