my @headings = (
   { key => 'k',    name => 'Kanji',      class => 'kanji'     },
   { key => 'skip', name => 'SKIP',       class => 'skip-code' },
   { key => 'co',   name => 'Suggestion', class => 'skip-code' },
   { key => 'disc', name => 'Discussion'                       },
);