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12 Days of Christmas
318
Christmas Trees
632
Diamonds
169
Divisors
542
Emirp Numbers
329
Evil Numbers
604
Fibonacci
696
Fizz Buzz
862
Fractions
477
Happy Numbers
272
Look and Say
393
Niven Numbers
863
Odious Numbers
602
Pernicious Numbers
193
Prime Numbers
409
Seven Segment
233
Tongue-twisters
268