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<!DOCTYPE html><html><body style="padding:20px;font-family:Arial"><div id="o"></div><script>const s=" Hello LearnCode! ";document.getElementById("o").innerHTML="<p>Trimmed: '"+s.trim()+"'</p><p>Upper: "+s.trim().toUpperCase()+"</p><p>Includes 'Learn': "+s.includes("Learn")+"</p>";</script></body></html>
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