and what's this part
and what's this part ?
æ n d WORD_BOUNDARY w ʌ t s WORD_BOUNDARY ð ɪ s WORD_BOUNDARY p ɑː ɹ t WORD_BOUNDARY
a n d WORD_BOUNDARY w h a t ' s WORD_BOUNDARY t h i s WORD_BOUNDARY p a r t WORD_BOUNDARY