Bad XML

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<sudoku>
    <innerWidth>3</innerWidth>
    <innerHeight>3</innerHeight>
        <row>6 0 0 0 1 0 5 0 0 </row>
        <row>8 0 3 0 0 0 0 0 0 </row>
        <row>0 0 0 0 6 0 0 2 0 </row>
        <row>0 3 0 1 0 8 0 9 0 </row>
        <row>1 0 0 0 9 0 0 0 4 </row>
        <row>0 5 0 2 0 3 0 1 0 </row>
        <row>0 7 0 0 3 0 0 0 0 </row>
        <row>0 0 0 0 0 0 3 0 6 </row>
        <row>0 0 4 0 5 0 0 0 9 </row>
</sudoku>