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

jexvmCmveGzFUimQMx, RVwOSJveGzFUimrcOwjEwe
veGzFUim

LeHzcEFc, WFzcExvJ
zcE

OEHjErAgGURlZz, lzuPErAgGFcpx

ErAgG