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chromium/third_party/blink/web_tests/svg/text/vertical-discrete-chars.html 

<!DOCTYPE html>
<svg width="750" height="550" style="background-color: blue">
  <text writing-mode="tb" x="100,300,500,700,900,1100,1300,1500,1700,1900" y="50,50,50,50,50,50,50,50,50,50">
    01234567890
  </text>
</svg>