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

MSzHyOuaJILkeY, eUibEHoHyOuaJIhfvXy
HyOuaJI

jdLbZSCzaAHGbNwILGmudOH, RdIPuEYJvUZSCzaAHGbNduLToRC
ZSCzaAHGbN

oXZmCSdFrMumlZcP, eFpOZmCSdFrIuHeS

ZmCSdFr