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

[Q]: dlzequypR, Puequqv
[A]: equ


[Q]: wLLwjL, arLwXm
[A]: Lw


[Q]: stjaeLdZCxBS, wchNujmrjaeLdZCxHVndnadH
[A]:
jaeLdZCx