sonst fällt 's um
sonst fällt 's um .
z ɔ n s t WORD_BOUNDARY f ɛ l t WORD_BOUNDARY  ɛ s WORD_BOUNDARY  ʊ m WORD_BOUNDARY
s o n s t WORD_BOUNDARY f ä l l t WORD_BOUNDARY ' s WORD_BOUNDARY u m WORD_BOUNDARY