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

my @headings = (
        {
...
         key => 'disc', name => 'Discussion'},
           );