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

Q: kWnjCoVmCSVuW, RILPKCoVmCSVbaOza

A: CoVmCSV
****
Q: bOvlVNWf, iivlVzWt

A: vlV
****
Q: xLrhjmLkERuDwEWXc, bxpPrhjmLkERuPpylDxH

A:
rhjmLkERu
****