what part is the thinnest
what part be the thin
pro:int n cop det:art adj
what part is the thinnest ?
w ʌ t WORD_BOUNDARY p ɑː ɹ t WORD_BOUNDARY ɪ z WORD_BOUNDARY ð ə WORD_BOUNDARY θ ɪ n ɪ s t WORD_BOUNDARY
w h a t WORD_BOUNDARY p a r t WORD_BOUNDARY i s WORD_BOUNDARY t h e WORD_BOUNDARY t h i n n e s t WORD_BOUNDARY