12 Days of Christmas
22nd
99 Bottles of Beer
16th
Abundant Numbers
37th
Christmas Trees
68th
CSS Colors
18th4th
Divisors
67th
Emojify
Evil Numbers
62nd
Fibonacci
171st
Fizz Buzz
156th
Leap Years
92nd
Morse Encoder
24th
Niven Numbers
80th
Odious Numbers
48th
Ordinal Numbers
34th
Pangram Grep
13th
Tongue-twisters
43rd
United States