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

[Q]: OjQHcFUCflYUptUPqYKVomn, GXHcFUCflYUpSSTrQ
[A]: HcFUCflYUp


[Q]: koddLvYmRXDUuUnW, GnqDYGmmRXDUuUquAnf
[A]: mRXDUuU


[Q]: AxHvBqnHYSIf, HZfByqnHYSjFo
[A]:
qnHYS