<?xml version="1.0" encoding="UTF-8"?>

<math xmlns="http://www.w3.org/1998/Math/MathML" display="block">  <menclose notation="box">    <mn>0</mn>
  </menclose>
  <menclose notation="box">
    <mn>1</mn>
  </menclose>
  <mspace width="verythinmathspace"></mspace>
  <menclose notation="box">
    <mn>2</mn>
  </menclose>
  <mspace width="thinmathspace"></mspace>
  <menclose notation="box">
    <mn>3</mn>
  </menclose>
  <mspace width="mediummathspace"></mspace>
  <menclose notation="box">
    <mn>4</mn>
  </menclose>
  <mspace width="thickmathspace"></mspace>
  <menclose notation="box">
    <mn>5</mn>
  </menclose>
  <mspace width="verythickmathspace"></mspace>
  <menclose notation="box">
    <mn>6</mn>
  </menclose> </math>