```
% pandoc -f native -t commonmark | pandoc -f commonmark -t native
[ OrderedList
    ( 1 , Decimal , Period )
    [ [ CodeBlock ( "" , [] , [] ) "hi" ] ]
]
^D
[ OrderedList
    ( 1 , Decimal , Period )
    [ [ CodeBlock ( "" , [] , [] ) "hi" ] ]
]
```