12 Days of Christmas
36th137th
99 Bottles of Beer
47th
Arabic to Roman
30th135th
Arrows
22nd72nd
Card Number Validation
19th
Christmas Trees
92nd
CSS Colors
25th
Diamonds
39th100th
Evil Numbers
125th
Fizz Buzz
278th850th
Hexdump
18th
ISBN
25th
Morse Encoder
34th
Niven Numbers
73rd194th
Odious Numbers
55th
Reverse Polish Notation
17th
Roman to Arabic
20th
Tongue-twisters
7th