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<!-- COMMENT -->
abc
<head>
<script>
function start() {
document.execCommand('justifyleft', false, )
document.designMode = 'on'
document.execCommand('insertparagraph', false, )
}
document.addEventListener('DOMContentLoaded', start)
</script>
</head>
<h4>
<em contenteditable="">
<big>
<button autofocus formnovalidate formtarget="">
</button>
<!-- COMMENT -->