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Less than 20:

4, 6, 8, 9, 10, 12, 14, 15, 16, 18, 20

Less than 30:

4, 6, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 22, 24, 25, 26, 27, 28, 30

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12y ago

What else can I help you with?