12 Days of Christmas
            2nd6th
                        
                    
        
            99 Bottles of Beer
            
                        
                    2nd
                        
                    
        
            Abundant Numbers
            
                        
                    3rd
                        
                    
        
            Abundant Numbers (Long)
            
                        
                    1st
                        
                    
        
            Arabic to Roman
            
                        
                    3rd
                        
                    
        
            Arrows
            
                        
                    6th
                        
                    
        
            ASCII Table
            
                        
                    💎
                        
                    
        
            brainfuck
            
                        
                    3rd
                        
                    
        
            Catalan Numbers
            
                        
                    💎
                        
                    
        
            Christmas Trees
            
                        
                    1st
                        
                    
        
            Collatz
            
                        
                    9th
                        
                    
        
            CSS Colors
            
                        
                    2nd
                        
                    
        
            Cubes
            
                        
                    💎
                        
                    
        
            Day of Week
            
                        
                    💎
                        
                    
        
            Diamonds
            
                        
                    
                        
                    
                        
                    
        
            Divisors
            
                        
                    1st
                        
                    
        
            Emirp Numbers
            
                        
                    6th
                        
                    
        
            Emirp Numbers (Long)
            
                        
                    4th
                        
                    
        
            Evil Numbers
            
                        
                    13th
                        
                    
        
            Evil Numbers (Long)
            
                        
                    11th
                        
                    
        
            Fibonacci
            
                        
                    3rd11th
        
            Fizz Buzz
            
                        
                    3rd
                        
                    
        
            Foo Fizz Buzz Bar
            
                        
                    2nd
                        
                    
        
            Forsyth–Edwards Notation
            
                        
                    2nd
                        
                    
        
            Fractions
            
                        
                    4th
                        
                    
        
            Game of Life
            
                        
                    2nd
                        
                    
        
            Happy Numbers
            
                        
                    2nd
                        
                    
        
            Happy Numbers (Long)
            
                        
                    9th
                        
                    
        
            Hexdump
            
                        
                    💎
                        
                    
        
            Intersection
            
                        
                    3rd
                        
                    
        
            Inventory Sequence
            
                        
                    6th
                        
                    
        
            ISBN
            
                        
                    3rd
                        
                    
        
            Jacobi Symbol
            
                        
                    3rd
                        
                    
        
            Kolakoski Sequence
            
                        
                    
                        
                    
                        
                    
        
            Leap Years
            
                        
                    8th
                        
                    
        
            Levenshtein Distance
            
                        
                    💎
                        
                    
        
            Leyland Numbers
            
                        
                    💎
                        
                    
        
            Look and Say
            
                        
                    3rd
                        
                    
        
            Lucky Numbers
            
                        
                    4th
                        
                    
        
            Maze
            
                        
                    1st
                        
                    
        
            Morse Encoder
            
                        
                    💎
                        
                    
        
            Niven Numbers
            
                        
                    1st
                        
                    
        
            Niven Numbers (Long)
            
                        
                    13th
                        
                    
        
            Number Spiral
            
                        
                    2nd
                        
                    
        
            Odious Numbers
            
                        
                    11th
                        
                    
        
            Odious Numbers (Long)
            
                        
                    9th
                        
                    
        
            Ordinal Numbers
            
                        
                    💎
                        
                    
        
            Pangram Grep
            
                        
                    1st
                        
                    
        
            Pascal’s Triangle
            
                        
                    1st
                        
                    
        
            Pernicious Numbers
            
                        
                    15th
                        
                    
        
            Pernicious Numbers (Long)
            
                        
                    7th
                        
                    
        
            Poker
            
                        
                    💎
                        
                    
        
            Prime Numbers
            
                        
                    3rd
                        
                    
        
            Prime Numbers (Long)
            
                        
                    2nd
                        
                    
        
            Proximity Grid
            
                        
                    💎
                        
                    
        
            Quine
            
                        
                    10th
                        
                    
        
            Recamán
            
                        
                    5th
                        
                    
        
            Repeating Decimals
            
                        
                    2nd
                        
                    
        
            Reverse Polish Notation
            
                        
                    2nd
                        
                    
        
            Rock-paper-scissors-Spock-lizard
            
                        
                    💎
                        
                    
        
            Roman to Arabic
            
                        
                    5th
                        
                    
        
            Rule 110
            
                        
                    
                        
                    
                        
                    
        
            Seven Segment
            
                        
                    1st
                        
                    
        
            SI Units
            
                        
                    💎
                        
                    
        
            Sierpiński Triangle
            
                        
                    4th
                        
                    
        
            Smith Numbers
            
                        
                    💎
                        
                    
        
            Spelling Numbers
            
                        
                    💎
                        
                    
        
            Star Wars Opening Crawl
            
                        
                    💎
                        
                    
        
            Sudoku
            
                        
                    💎
                        
                    
        
            Sudoku (Fill-in)
            
                        
                    💎
                        
                    
        
            Time Distance
            
                        
                    💎
                        
                    
        
            Tongue-twisters
            2nd2nd
                        
                    
        
            Vampire Numbers
            
                        
                    4th
                        
                    
        
            Van Eck Sequence
            
                        
                    1st
                        
                    
        
            Zodiac Signs
            
                        
                    1st
                        
                    
        
            γ
            3rd2nd
                        
                    
        
            λ
            
                        
                    3rd
                        
                    
        
            π
            
                        
                    5th