Html elements strong, ruby, and hgroup

strong element Specifies that the enclosed text should be rendered in the browser as "strong" (usually bold) text, ruby element Defines a container for Ruby Text, hgroup element The HTML Headings Group Element (<hgroup>) represents the heading of a section. These elements allows child elements from interactive, embedded, heading, sectioning, phrasing, and metadata content categories.

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strong strong and ruby, strong, ruby, and hgroup

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