12 Days of Christmas
257th
99 Bottles of Beer
235th
Abundant Numbers
63rd
Arrows
40th
brainfuck
162nd
42nd
Divisors
68th
Emirp Numbers
56th
Evil Numbers
105th
Forsyth–Edwards Notation
34th
Leap Years
85th
Levenshtein Distance
1st
Morse Decoder
27th
Niven Numbers
69th
Pangram Grep
15th
Pernicious Numbers
52nd
Quine
1st81st31st1st99th
Rock-paper-scissors-Spock-lizard
40th
Star Wars GPT
21st
Van Eck Sequence
33rd
π
140th
φ