use strict;
use warnings;

use Parse::RecDescent;

my $grammar = q {
  
  start    :  character character character(s)
              {print "Found: ", $item[1], $item[2], join "", @{$item[3]}, "\n"; }

  character:  /\w/ {print "Character: $item[1]\n"}
};

my $parser = Parse::RecDescent->new($grammar);

defined $parser->start("ABCD") or die "didn't match";