```
% pandoc -t native
# hi _a
b_

# hi _c
c
^D
[ Header 1
  ( "hi-_a", [], [] )
  [ Str "hi", Space, Str "_a" ]
, Para
  [ Str "b_" ]
, Header 1
  ( "hi-_c", [], [] )
  [ Str "hi", Space, Str "_c" ]
, Para
  [ Str "c" ]
]
```