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

[Q]: NTINFnRckGsfLqhSoA, UUONcKKFnRckGsfLqVak
[A]: FnRckGsfLq


[Q]: TUAHhdvHIBxogI, LjfGsAHhdvHJcSdNV
[A]: AHhdvH


[Q]: GkeerkvYknbNWnZsOtcjl, tWKQtbcPdkvYknbNWnZrhux
[A]:
kvYknbNWnZ