These blocks can be nested inside of each other as well, for example:
ð iː z WORD_BOUNDARY b l ɑ k s WORD_BOUNDARY k æ n WORD_BOUNDARY b iː WORD_BOUNDARY n ɛ s t ɪ d WORD_BOUNDARY ɪ n s aɪ d WORD_BOUNDARY ʌ v WORD_BOUNDARY iː t̠ʃ WORD_BOUNDARY ʌ ð ə ɹ ɹ WORD_BOUNDARY æ z WORD_BOUNDARY w ɛ l WORD_BOUNDARY f ɔ ɹ WORD_BOUNDARY ɛ ɡ z æ m p ə l WORD_BOUNDARY