I'm not exactly sure
I not exact sure
pro:sub neg adv adj
i'm not exactly sure.
aɪ m WORD_BOUNDARY n ɑ t WORD_BOUNDARY ɛ ɡ z æ k t l i WORD_BOUNDARY ʃ ʊ ɹ WORD_BOUNDARY
i ' m WORD_BOUNDARY n o t WORD_BOUNDARY e x a c t l y WORD_BOUNDARY s u r e . WORD_BOUNDARY