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

Q: OBzHWjmkcgVGPyv, gCHWjmkcgVMq

A: HWjmkcgV
****
Q: slTUxy, oqTUYa

A: TU
****
Q: tWnpMNEoNIynsj, AJZONEoNIGIxp

A:
NEoNI
****