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

[Q]: sEYtoQlG, XIstoQQPw
[A]: toQ


[Q]: SUueHhzGsanfsalEEc, KygEhzGsanfsapbKKX
[A]: hzGsanfsa


[Q]: jyqqPAWAZdIEoDgspt, MMSHWKAWAZdIEON
[A]:
AWAZdIE