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

ohueEOjHvAuoFVmMFft, ovdJPqOjHvAuoFVGbvxzlnE
OjHvAuoFV

CxwZWv, mkwZgM
wZ

SXZPmYCLxHhNhPUdoTVOui, bbEyjCYSyUPmYCLxHhNhBAzXcMS

PmYCLxHhNh