JSFiddle - React, Tailwind, and code Playground

HTML

<ul>
    <li>x</li><li>x</li><li>x</li>
    <li>x</li><li>x</li><li>x</li>
    <li>z</li><li>z</li><li>z</li>
</ul>

<ul>
    <li>x</li><li>x</li><li>x</li>
    <li>x</li><li>x</li><li>x</li>
    <li>z</li><li>z</li>
</ul>

<ul>
    <li>x</li><li>x</li><li>x</li>
    <li>z</li><li>z</li>
</ul>

CSS

ul{
    margin: 0; padding: 0;
    list-style: none;
    width:  300px;    
    margin:  50px;   
    position: relative;
    height: auto;
    overflow: hidden;
    background-color: blue;
}

li{
    margin-bottom: -1px;
    border-bottom: solid 1px #ccc;
    width: 33%;
    display: inline-block;
    text-align:center;
    padding: 10px 0;
}