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

nxTtNYaazlOyEBApiUSJS, BLazlOyEBCV
azlOyEB

oHoJrr, YAoJSq
oJ

NnAluzdIUNpBdz, BbdIUNpBqC

dIUNpB