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

[Q]: HiEuutntEBpU, fdkqEuutntEBABdGZRND
[A]: EuutntEB


[Q]: HSsyZzZLZAAq, MFEZzZLJC
[A]: ZzZL


[Q]: sYyprzIatLCesnHWxtD, DlYoprzIatLCBU
[A]:
przIatLC