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by _cs2017_ 483 days ago
I can only confirm two mistakes in the apper: 1) As you say, the reversed(self.dict) is actually correct; 2) as another poster below said, hints are not part of the input. These two mistakes are so egregious given the objective of the paper that I'm convinced the authors are not qualified to write it.

IMHO, it is probably better to discard this paper, and wait for someone else to cover this important topic.