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

[Q]: YlhtTQgHiffTbIbBrcHMqFKCdWz, HyregFgMffTbIbBrcHYUnnQvGlx
[A]: ffTbIbBrcH


[Q]: OhMVLbQhBxEaOZY, iDVLbQhBxBiiD
[A]: VLbQhBx


[Q]: xowIxZkleLQnpOglkmcgE, msjtoVqGkvIxZkleLQnpoZ
[A]:
IxZkleLQnp