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

[Q]: vISTrmBMpQyanUTSXUCm, dJGyOHMpQyanUTpSb
[A]: MpQyanUT


[Q]: cKsJcqYvZO, UrsJcqBC
[A]: sJcq


[Q]: uFolKyxdxFHwzCjyMTUiLJcG, BOgWAWtGYHwzCjyMTUiGk
[A]:
HwzCjyMTUi