JSFiddle - React, Tailwind, and code Playground

HTML

<div id="block">
    hello
</div>

CSS

#block {
    text-align:center;
    background: #000;
    color: white;
    width:150px;
    overflow:hidden;
}
#block:before{
    content:"1";
    float:left;
}
#block:after{
    content:"12";
    float:right;
}