`  : I'm curious as to why some of the labial initials are followed with -eng and others with -ong when they all have the same rhyme (whether the speaker rhymes them with ``teng`` or not). I wonder the same about ``ben`` ``pen`` ``men`` ``fen`` and ``wun``. This seems an inconsistency with the way Standard Mandarin is pronounced in Taiwan. Those with heavy Taiwanese accents (as opposed to Standard Mandarin) would say ``wun`` or even ``?wun`` (? being a glottal stop), but the same people would say ``hun`` instead of ``fen``. { }`