<<< native
[ EStyled
    TextDoubleStruck
    [ EArray
        [ AlignLeft ]
        [ [ [ EText TextNormal "0123456789" ] ]
        , [ [ EText TextNormal "ABCDEFGHIJKLMNOPQRSTUVWXYZ" ] ]
        , [ [ EText TextNormal "abcdefghijklmnopqrstuvwxyz" ] ]
        ]
    ]
]
>>> mml
<?xml version='1.0' ?>
<math display="block" xmlns="http://www.w3.org/1998/Math/MathML">
  <mtable>
    <mtr>
      <mtd columnalign="left" style="text-align: left">
        <mtext mathvariant="double-struck">𝟘𝟙𝟚𝟛𝟜𝟝𝟞𝟟𝟠𝟡</mtext>
      </mtd>
    </mtr>
    <mtr>
      <mtd columnalign="left" style="text-align: left">
        <mtext mathvariant="double-struck">𝔸𝔹ℂ𝔻𝔼𝔽𝔾ℍ𝕀𝕁𝕂𝕃𝕄ℕ𝕆ℙℚℝ𝕊𝕋𝕌𝕍𝕎𝕏𝕐ℤ</mtext>
      </mtd>
    </mtr>
    <mtr>
      <mtd columnalign="left" style="text-align: left">
        <mtext mathvariant="double-struck">𝕒𝕓𝕔𝕕𝕖𝕗𝕘𝕙𝕚𝕛𝕜𝕝𝕞𝕟𝕠𝕡𝕢𝕣𝕤𝕥𝕦𝕧𝕨𝕩𝕪𝕫</mtext>
      </mtd>
    </mtr>
  </mtable>
</math>