but I'm not quite sure
but i'm not quite sure .
b ʌ t WORD_BOUNDARY aɪ m WORD_BOUNDARY n ɑː t WORD_BOUNDARY k w aɪ t WORD_BOUNDARY ʃ ʊ ɹ WORD_BOUNDARY
b u t WORD_BOUNDARY i ' m WORD_BOUNDARY n o t WORD_BOUNDARY q u i t e WORD_BOUNDARY s u r e WORD_BOUNDARY