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#point:after{
content:"\02148";
}
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<p>Double Struck Italic Small I using Hexa Decimal: ⅈ</p>
<p>Double Struck Italic Small I using HTML Code: ⅈ</p>
<p>Double Struck Italic Small I using HTML Entity: ⅈ</p>
<p id="point">Double Struck Italic Small I using CSS Entity: </p>
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