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

[Q]: TWVTGNBh, nEVTGWq
[A]: VTG


[Q]: cxYVucnmEQopeWHrPJ, jNnOaYVucnmEQoSE
[A]: YVucnmEQo


[Q]: wxXyOJASfYALQwRDhg, PjBRnnEzyOJASfYAZQazqAy
[A]:
yOJASfYA