score:2

Accepted answer

you just need to make the text elements for the numbers and letters different. one easy way to do that is using classes.

svg.selectall('text.letter')
   .date(letters)
  .enter()
   .append('text')
   .classed('letter', true)
   // ...

svg.selectall('text.number')
   .date(numbers)
  .enter()
   .append('text')
   .classed('number', true)
   // ...

working demo


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