Fix timing between characters and words.

[evan-brass]

The old timing was 5 units between letters and I think 13 units between words.
The corrected timing is 3 units between letters and 7 units between words.

I remember thinking a lot about this and I still messed it up, oops.

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[sime]

These values should be defined as constants somewhere early in the code. Otherwise they are magic numbers.