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

[Q]: DwLGzwYOWjtzIunE, TTViSbkwYOWjtzNqUOOz
[A]: wYOWjtz


[Q]: bUHPpvVtFQNSpUdg, zggEFoKBHPpvVtFQNHXsc
[A]: HPpvVtFQN


[Q]: djlrXxkUWlVLHUSKzPVYA, SDYidUWlVLHUSEsgiqNQ
[A]:
UWlVLHUS