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

[Q]: OFbCjZDoRRlLsMU, DcCjZDoRRtld
[A]: CjZDoRR


[Q]: kvutZfcPKzHE, kTKutZfcPTGmU
[A]: utZfcP


[Q]: Pgfrbt, JtfrwC
[A]:
fr