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

[Q]: lQwpMQRxuVbJDv, UkzwpMQRxuDVT
[A]: wpMQRxu


[Q]: fAsWQxuyBevvLogrSrgg, tmdBEUxuyBevvLogXjiMCbh
[A]: xuyBevvLog


[Q]: oTZZcCVi, jwZZcwK
[A]:
ZZc