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

jAinxmaQUrmu, jqeEnxmaQUrWlrEqW
nxmaQUr

gHFwDorPbNPORVgdLW, AfqDQvCGFwDorPbNPVPVmbQ
FwDorPbNP

phDNrwveOuIXhYJHWnyhvNwbI, fVsDGaorveOuIXhYJHtkXyktIE

veOuIXhYJH