1Foo [bar] [1].
2
3Foo [bar][1].
4
5Foo [bar]
6[1].
7
8[1]: /url/  "Title"
9
10
11With [embedded [brackets]] [b].
12
13
14Indented [once][].
15
16Indented [twice][].
17
18Indented [thrice][].
19
20Indented [four][] times.
21
22 [once]: /url
23
24  [twice]: /url
25
26   [thrice]: /url
27
28    [four]: /url
29
30
31[b]: /url/
32