12 Days of Christmas
16th
99 Bottles of Beer
14th
Abundant Numbers
35th
Christmas Trees
65th
CSS Colors
19th4th
Divisors
64th
Emojify
Evil Numbers
58th
Fibonacci
157th
Fizz Buzz
144th
Leap Years
87th
Morse Encoder
26th
Niven Numbers
74th
Odious Numbers
46th
Ordinal Numbers
32nd
Pangram Grep
13th
Tongue-twisters
40th
United States