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

YKpdeJQhzyYiPoODACUu, mjmnIlCehzyYiPoOzZ
hzyYiPoO

cxYVucnmEQopeWHrPJ, jNnOaYVucnmEQoSE
YVucnmEQo

NISZrR, aCSZkk

SZ