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This is what I've come up with so far:

"\C-\eU": upcase-word
"\C-\eL": downcase-word
"\C-\eC": capitalize-word
"\eu": "\C-f\eb\C-\eU"
"\el": "\C-f\eb\C-\eL"
"\ec": "\C-f\eb\C-\eC"

Is there some other way that wouldn't require defining the temporary keybindings?

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