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]: oZZUNCUHtIiauDxQ, OdindZUNCUHtIiLQmWJJf
[A]: ZUNCUHtIi


[Q]: deSNWomhPTRNC, lDUVQueNWomhPTKOb
[A]:
NWomhPT