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

Q: wlFcxOHoXC, IWFcxOIWTk

A: FcxO
****
Q: iupYjFXrrMqWzJSLUSwmEukHc, hqajjWrrMqWzJSLnF

A: rrMqWzJSL
****
Q: jleDJITEfrBGKl, ahAXoJITEfrBGei

A:
JITEfrBG
****