12 Days of Christmas
489455
99 Bottles of Beer
566
Arabic to Roman
485455
Arrows
561562
Card Number Validation
472
Christmas Trees
408
CSS Colors
138
Diamonds
460452
Evil Numbers
418
Fizz Buzz
813865
Hexdump
ISBN
731
Morse Encoder
215
Niven Numbers
617692
Odious Numbers
601
Reverse Polish Notation
633
Roman to Arabic
462
Tongue-twisters
559