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

Q: gfXPLNzsyfEotmHL, oJeXPLNzsyJuXP

A: XPLNzsy
****
Q: libDFDxIgRiglWfxMVRr, yMltDxIgRiglpms

A: DxIgRigl
****
Q: KcbVyuZppc, aohNpbVyuZZOyJw

A:
bVyuZ
****