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

Q: wkVVZREWhcSCpvCTB, ZQWhcSCpvCDVUY

A: WhcSCpvC
****
Q: ahPbomjSH, rBbomynK

A: bom
****
Q: yVasvMCb, QCasvdOL

A:
asv
****