12 Days of Christmas
58th99 Bottles of Beer
65thArabic to Roman
12thChristmas Trees
39thDivisors
44thEvil Numbers
81stFibonacci
85thFizz Buzz
174thHappy Numbers
49thLeap Years
78thMorse Decoder
13thMorse Encoder
14thOdious Numbers
64thOrdinal Numbers
17thPangram Grep
44thPascalβs Triangle
24thPernicious Numbers
43rdPrime Numbers
43rdRock-paper-scissors-Spock-lizard
12th