B:	it's not always convenient to do it.
b iː WORD_BOUNDARY ɪ t s WORD_BOUNDARY n ɑ t WORD_BOUNDARY ɔ l w eɪ z WORD_BOUNDARY k ə n v iː n ɪ ə n t WORD_BOUNDARY t ə WORD_BOUNDARY d uː WORD_BOUNDARY ɪ t WORD_BOUNDARY