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

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


[Q]: zqRbqwgmqGIAGTeeoGFOSr, RFnLqwgmqGIAGLcEvAWxY
[A]: qwgmqGIAG


[Q]: tZFQmWyYXTRcaSVyyeY, YvWyYXTRcaSVicF
[A]:
WyYXTRcaSV