12 Days of Christmas
            15th
        
            Abundant Numbers
            61st
        
            brainfuck
            25th
        
            Christmas Trees
            23rd
        
            Diamonds
            17th
        
            Divisors
            69th
        
            Emirp Numbers
            39th
        
            Evil Numbers
            73rd
        
            Fizz Buzz
            114th
        
            Leap Years
            85th
        
            Odious Numbers
            63rd
        
            Ordinal Numbers
            27th
        
            Pernicious Numbers
            43rd
        
            Prime Numbers
            56th
        
            Quine
            15th
        
            Rock-paper-scissors-Spock-lizard
            16th
        
            Rule 110
            21st
        
            Sierpiński Triangle
            23rd