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

[Q]: lypuwWy, jRpuwcE
[A]: puw


[Q]: jyJrDIhxJtWbnooEXZ, uyXifNCIhxJtWbnVCUrt
[A]: IhxJtWbn


[Q]: AtiBDA, sYiBvE
[A]:
iB