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{ 11, 16, 17, 18, 19, 24, 25, 26, 31, 32, 33 }
{ 21, 23 }
{ }
{ 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 13, 15, 20, 22, 27, 28 }
{ 14 }
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