Syntax::tsntxi: 
   "1, 2, 2, 3, 3, 4, 4, 4, 5, 5, 5" is incomplete; more input is needed.

ToExpression::esntx: Could not parse 1, 2, 2, 3, 3, 4, 4, 4, 5, 5, 5 as input.

<math 
  xmlns='http://www.w3.org/1998/Math/MathML'>
  <semantics>
    <mi>$Failed</mi>
    <annotation-xml encoding='MathML-Content'>
      <ci>$Failed</ci>
    </annotation-xml>
  </semantics>
</math>