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

Q: uqazNuZhdJhw, KbnrzNuZhBdp

A: zNuZh
****
Q: elloYaejTczBiiNOU, XoCPzloYaejTcXYtKODL

A: loYaejTc
****
Q: ZESnlnnEtvX, jjMDlnnEthsjm

A:
lnnEt
****