backa in tro-r du de
backa in tro-r du de ?
b a kː a WORD_BOUNDARY ɪ n WORD_BOUNDARY t r uː ɛ r WORD_BOUNDARY d ʉ WORD_BOUNDARY d eː WORD_BOUNDARY
b a c k a WORD_BOUNDARY i n WORD_BOUNDARY t r o - r WORD_BOUNDARY d u WORD_BOUNDARY d e WORD_BOUNDARY