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

Q: uHGHiARtdJbuG, OdZmiARtdrhC

A: iARtd
****
Q: wbdHVigIkjNkuAmbr, iSgIkjNkQYyn

A: gIkjNk
****
Q: imkMksrxenvoULPFHChrmHsdX, zGQvojhtanvoULPFHCiTmI

A:
nvoULPFHC
****