they're working on it
they work on it
pro:sub part prep pro:per
they're working on it .
ð eɪ ɚ WORD_BOUNDARY w ɜː k ɪ ŋ WORD_BOUNDARY ɔ n WORD_BOUNDARY ɪ t WORD_BOUNDARY
t h e y ' r e WORD_BOUNDARY w o r k i n g WORD_BOUNDARY o n WORD_BOUNDARY i t WORD_BOUNDARY