title: Auto space a text each 4 characters by CSS?
body: <p>I wanted to ask if that text can automatically change to that form when you type by CSS.</p>
  
  <p><strong>Before</strong> : 513031421694 // <strong>After</strong> : 5130 3142 1694</p>
  
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  <p>I tried these ones (letter-spacing / word-spacing), without success, and I can only touch the CSS.</p>