br element Specifies a hard line break in the text, hgroup element The HTML Headings Group Element (<hgroup>) represents the heading of a section, abbr element Specifies that a string is an abbreviation for a longer word or phrase. These elements allows child elements from interactive, embedded, heading, sectioning, phrasing, and metadata content categories.
Click the html element name in the punctuation list to advance the example in 'Tryit-Editor':