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

[Q]: PShMbsbexXGlpBuMMDZZS, sVqGxSexXGlpBxuHXoI
[A]: exXGlpB


[Q]: jdLbZSCzaAHGbNwILGmudOH, RdIPuEYJvUZSCzaAHGbNduLToRC
[A]: ZSCzaAHGbN


[Q]: ErnfHFvAMOJHfmFweMQyWDwKD, HVvAMOJHfmFwdzbbXfWy
[A]:
vAMOJHfmFw