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

[Q]: jJSSBmflUyrEMLjSycA, YkmujkSSBmflUyrKKJZ
[A]: SSBmflUyr


[Q]: ptVlCwpfOZIi, QEdyVlCwpfOwp
[A]: VlCwpfO


[Q]: rlBoVyFsYqpmmQmelGBg, iKKaIyFsYqpmmWcrKn
[A]:
yFsYqpmm