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<html>
 <head>
  <style>
   body > span { border: 3px solid blue }
   body > span > span { border: 3px solid cyan }
  </style>
 </head>
 <body>
  <span><span
  ><span>One</span
  ><span>Two</span
  ><span>Three</span
  ><div>Four</div
  ><div>Five</div
  ><span>Six</span
  ><div>Seven</div
  ><div>Eight</div
  ><span>Nine</span
  ><span>Ten</span
 ></span></span>
 </body>
</html>