must be a special door
must be a special door .
m ʌ s t WORD_BOUNDARY b iː WORD_BOUNDARY ɐ WORD_BOUNDARY s p ɛ ʃ ə l WORD_BOUNDARY d oː ɹ WORD_BOUNDARY
m u s t WORD_BOUNDARY b e WORD_BOUNDARY a WORD_BOUNDARY s p e c i a l WORD_BOUNDARY d o o r WORD_BOUNDARY