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

goyZUz, QryZlD
yZ

zeuyZKwvIOfx, BlmZKwvspUt
ZKwv

MAkWsAopOGEAjfg, rVcvZopOGEAjCFPOGy

opOGEAj