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

Q: vMsEJRoLkWcmkuwNRz, ZmoLkWcmVZiBv

A: oLkWcm
****
Q: BfCCzPNLBbwCoxMVAG, vhwNLBbwCbH

A: NLBbwC
****
Q: jCVyFhNUsechq, eqLQhNUseciJnZ

A:
hNUsec
****