12 Days of Christmas
15th
99 Bottles of Beer
14th
Abundant Numbers
Christmas Trees
62nd
CSS Colors
19th4th
Divisors
64th
Emojify
Evil Numbers
59th
Fibonacci
159th
Fizz Buzz
148th
Leap Years
87th
Morse Encoder
25th
Niven Numbers
73rd
Odious Numbers
44th
Ordinal Numbers
33rd
Pangram Grep
13th
Tongue-twisters
41st
United States