Keywords forbidden inside "sentence" and "phrase" commands

[crypdick]

to: Saying phrase or sentence followed by any digit was added with #12, with the exception of two (which is usually recognized as "to").

Also forbidden are number, late, rate, left, right, etc.

Expected functionality: phrase and sentence mode should input the raw words without parsing, and if you want to insert a symbol you wait for the phrase to be parsed and insert it outside of phrase mode.