12 Days of Christmas
16th
99 Bottles of Beer
15th
Abundant Numbers
35th
Christmas Trees
68th
CSS Colors
19th4th
Divisors
67th
Emojify
Evil Numbers
62nd
Fibonacci
171st
Fizz Buzz
156th
Leap Years
91st
Morse Encoder
26th
Niven Numbers
80th
Odious Numbers
48th
Ordinal Numbers
34th
Pangram Grep
13th
Tongue-twisters
43rd
United States