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

Q: jLbHvZmecfxMcGLXGVsO, erFBGmecfxMcJtDyKGZ

A: mecfxMc
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Q: hCRsCCOoLMpjXwI, lVRCOoLMpxaYFbY

A: COoLMp
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Q: ciQqfmdImugzpkXvEJBe, UCMQfmdImugzpkJSwNND

A:
fmdImugzpk
****