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

[Q]: NUuLSmDjCKcJPc, lGGSLIDjCKcJBo
[A]: DjCKcJ


[Q]: bmZKWkYPqugcvzbHykblPzQLhK, tPUzKqugcvzbHypzk
[A]: qugcvzbHy


[Q]: XHRPWHqmWTUmdmUGS, zVJEVZxWHqmWTUfIC
[A]:
WHqmWTU