12 Days of Christmas
16th
99 Bottles of Beer
15th
Abundant Numbers
35th
Christmas Trees
69th
CSS Colors
19th4th
Divisors
68th
Emojify
Evil Numbers
63rd
Fibonacci
173rd
Fizz Buzz
157th
Leap Years
93rd
Morse Encoder
27th
Niven Numbers
83rd
Odious Numbers
50th
Ordinal Numbers
35th
Pangram Grep
13th
Tongue-twisters
44th
United States