instruction:
In this task, you are given two strings A, B. Find the longest common substring in the strings A and B.
question:
gXwuhXJrEdzGOmLSKdK, TohXJrEdzGavU
answer:
hXJrEdzG


question:
gHFwDorPbNPORVgdLW, AfqDQvCGFwDorPbNPVPVmbQ
answer:
FwDorPbNP


question:
bTVcmDxQJ, aiwcmDSc
answer:

cmD