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

SUueHhzGsanfsalEEc, KygEhzGsanfsapbKKX
hzGsanfsa

bUcuzFgsdfojVR, IdcuzFgsdMRgtMA
cuzFgsd

VSIbLRw, bFGIbLoop
IbL