Html elements sub, embed, and bdo

sub element Specifies that the enclosed text should be rendered in the browser as subscript, embed element Defines an object, such as a multimedia file, embedded in an HTML document, 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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sub sub and embed, sub, embed, and bdo

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