what's he sitting on
what's he sitting on ?
w ʌ t s WORD_BOUNDARY h iː WORD_BOUNDARY s ɪ ɾ ɪ ŋ WORD_BOUNDARY ɔ n WORD_BOUNDARY
w h a t ' s WORD_BOUNDARY h e WORD_BOUNDARY s i t t i n g WORD_BOUNDARY o n WORD_BOUNDARY