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

Q: ugDpSMRvHM, DDwSMRvxw

A: SMRv
****
Q: HaIPcFXLhYDp, AdIPcFXtJdRE

A: IPcFX
****
Q: bdbLbU, bBbLCP

A:
bL
****