Get difference between two lists

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Music by Eric Matyas
https://www.soundimage.org
Track title: Puzzle Game 2

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Chapters
00:00 Question
00:27 Accepted answer (Score 1719)
01:00 Answer 2 (Score 621)
02:19 Answer 3 (Score 237)
02:45 Answer 4 (Score 129)
02:58 Thank you

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Full question
https://stackoverflow.com/questions/3462...

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Tags
#python #performance #list #set #setdifference

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