You’ll need to parse these tags: <p/>, <br/>, <blockquote/>, and <del/>.
A sequence of two or more consecutive newline characters starts a new paragraph. Other formatting commands do not cross paragraphs.
A single newline character is a soft line break, <br/>.
A blockquote is one or more consecutive lines where the first two characters on the line are > (a greater-than sign followed by a space).
Text in strikethrough (<del></del>) is surrounded by a pair of ~~ (two tildes).
markdown_input = """This is a paragraph with a soft
line break.
This is another paragraph that has
> Some text that
> is in a
> block quote.
This is another paragraph with a ~~strikethrough~~ word."""
output = """<p>This is a paragraph with a soft<br />line break.</p>
<p>This is another paragraph that has<br />
<blockquote>Some text that<br />is in a<br />block quote.</blockquote>
</p>
<p>This is another paragraph with a <del>strikethrough</del> word.</p>"""
Note: It’s not important to produce this specific output! We only care if the HTML is valid.
This problem asks you to convert a restricted Markdown-like text format into valid HTML. You need to handle paragraph breaks, soft line breaks, blockquotes, and strikethrough markup while respecting the rule that formatting does not cross paragraph boundaries. A clean solution typically scans the input line by line, groups lines into paragraphs, detects blockquote prefixes, and replaces inline markers such as newlines and double tildes with the corresponding HTML tags.
