12 Days of Christmas
231st
99 Bottles of Beer
221st
Abundant Numbers
54th
Arrows
32nd
brainfuck
146th
35th
Divisors
60th
Emirp Numbers
49th
Evil Numbers
93rd
Forsyth–Edwards Notation
27th
Leap Years
74th
Levenshtein Distance
1st
Morse Decoder
23rd
Niven Numbers
59th
Pangram Grep
15th
Pernicious Numbers
48th
Quine
1st79th28th1st96th
Rock-paper-scissors-Spock-lizard
34th
Van Eck Sequence
28th
π
118th
25th
φ
53rd