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

Q: SyweIt, ILweip

A: we
****
Q: pySBCdpe, AEBCdOR

A: BCd
****
Q: fZqOaywMgLDFND, clAqOaywMAphA

A:
qOaywM
****