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Thor40's achievement

Ruby

Has a chance to trigger once a day on an easy dan problem.

Uncommon

Recently completed by

Игорь Наумов 1d,

Xavier Richard 3k,

Кирилл Степанов 2k,

ปริยากร สายแก้ว 3k,

Eric Shrewsberry 6k,

Tyler Oyakawa 2k,

and 535 others.