12 Days of Christmas
848861
99 Bottles of Beer
673
Arabic to Roman
488480
Arrows
464439
Card Number Validation
473
Christmas Trees
411
CSS Colors
110
Diamonds
467455
Evil Numbers
426
Fizz Buzz
756868
Hexdump
686
ISBN
736
Morse Encoder
242
Niven Numbers
642696
Odious Numbers
624
Reverse Polish Notation
638
Roman to Arabic
476
Tongue-twisters
609