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

CuizrSvJTRWZK, udyrSvJTRZzkS
rSvJTR

mjCEUoPmeKbvCgUtUL, SrHtrPmeKbvYpQAVp
PmeKbv

CsPidg, hfPiUW

Pi