> And what "default" rule is that?
That a vowel followed by a single consonant followed by a vowel is "long".
Examples:
        default
        rule
        silent
        directly
        pronounce
        consonant
        wrote
        line
        user
        date
        resent
        obeying
        request
There are, of course, numerous exceptions.  Debian is one of them.
-- 
John Hasler