Html elements sup, hgroup, and bdo

sup element Specifies that the enclosed text should be rendered in the browser as superscript, hgroup element The HTML Headings Group Element (<hgroup>) represents the heading of a section, bdo element Specifies the text direction for the document. These elements allows child elements from interactive, embedded, heading, sectioning, phrasing, and metadata content categories.

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sup sup and hgroup, sup, hgroup, and bdo

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