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

wkVVZREWhcSCpvCTB, ZQWhcSCpvCDVUY
WhcSCpvC

ohueEOjHvAuoFVmMFft, ovdJPqOjHvAuoFVGbvxzlnE
OjHvAuoFV

ZnxCHhgSvlX, EMeFCHhgeSt

CHhg