# code: http://golf.shinh.org/reveal.rb?tes+rotnac/whio_1716773225&nbb
# target Nibbles version: 1.00
# commenter version: 0.1.6.187

\ #(reverse):[[chr]] 
    `' #(transpose):[[chr]] 
        . #(map):[[chr]] 
            `* #(nary cartesian product):[[chr]] 
                : #(append):[[chr]] 
                    "*" #(string):[chr] 
                    ^ #(replicate):[[chr]] 
                        4 #(integer):int 
                        : #(append):[[chr]] 
                            "* *" #(string):[chr] 
                            ~ #(auto = []):auto 
            \A 
            =\ #(scanl1):[chr] 
                A #($):[chr] 
                \C B 
                `& #(bit intersection):chr 
                    B #(@):chr 
                    C #($):chr