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

Q: aeQjEeiWGONmzGimhGiw, RIEeiWGONmOZuVYr

A: EeiWGONm
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Q: eFUexDIFlaPDUwrOb, mTvkKGUxDIFlaPDUwxGVpnIwbi

A: xDIFlaPDUw
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Q: HHQYJrcNfOrhXAsbl, QgkkzkrcNfOrsfKiQO

A:
rcNfOr
****