um not always positive
um not always positive.
ʌ m WORD_BOUNDARY n ɑ t WORD_BOUNDARY ɔ l w eɪ z WORD_BOUNDARY p ɑ z ɪ t ɪ v WORD_BOUNDARY
u m WORD_BOUNDARY n o t WORD_BOUNDARY a l w a y s WORD_BOUNDARY p o s i t i v e . WORD_BOUNDARY