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

[Q]: euQWhCovKplukMYznXcD, XAfMhKdzhCovKplukMcMlSuBw
[A]: hCovKplukM


[Q]: JzbEpAquDJFKcNvEWZxVqRV, PFiJlpAquDJFKcNcqOpMeAv
[A]: pAquDJFKcN


[Q]: XpPAnHimzHQDkT, MFAnHimznHw
[A]:
AnHimz