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

[Q]: DZfOjrQffR, CXOjrQQc
[A]: OjrQ


[Q]: RwduMBkDazrwZP, UPzcwtWMBkDazrAw
[A]: MBkDazr


[Q]: oNijAK, ZmijSb
[A]:
ij