UNARY = ';1;\0' => {
    ~ 'Conversion step: \0'

    /(.*);(.*);(.*)0/ ::= '\1;\2\2;\3'
    /(.*);(.*);(.*)1/ ::= '\1\2;\2\2;\3'

    /(.*);(.*);$/ ::= '\1'
}


FIZZ     = UNARY => /(.{3})*/ ::= ~ 'fizz'
BUZZ     = UNARY => /(.{5})*/ ::= ~ 'buzz'
FIZZBUZZ = UNARY => /(.{15})*/ ::= ~ 'fizzbuzz'

FIZZ_BUZZ = [
    FIZZBUZZ
    FIZZ
    BUZZ
    ~ '\0'
]

':::' => FIZZ_BUZZ