role AOC {
  # Exists mostly to allow day3 to run a subparse instead of a full parse
  method aocparse(::?CLASS:U: $content) {
    self.parse($content).made
  }
  method part1(::?CLASS:U: $v) { ... }

  method part2(::?CLASS:U: $v) { ... }
  
  method main(::?CLASS:U:) {
    my \parsed = self.aocparse(slurp(@*ARGS[0]));
    say self.part1(parsed);
    say self.part2(parsed);
   }
}