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

[Q]: MSzHyOuaJILkeY, eUibEHoHyOuaJIhfvXy
[A]: HyOuaJI


[Q]: njzfcapS, JDzfcYQh
[A]: zfc


[Q]: WDBfiEgeoXaKzr, FJREgeoXfMhj
[A]:
EgeoX