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Top 10 most difficult in DB

IdnrStarting numbersDifficulty
66422 (Super hard)
302580 (Super easy)
302440 (Very easy)
302380 (Super easy)
302260 (Super easy)
302160 (Super easy)
302060 (Very easy)
301980 (Very easy)
301860 (Super easy)
301780 (Super easy)