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    select A.hacker_id, B.name from Submissions A Inner Join Hackers B on A.hacker_id = B.hacker_id INNER JOIN Challenges C ON A.challenge_id = C.challenge_id INNER JOIN Difficulty D ON C.difficulty_level = D.difficulty_level Where A.score = D.score Group by A.hacker_id, B.name having count() > 1 order by COUNT() DESC, A.hacker_id ASC