Kerstin was ist das
kerstin was ist das ?
k ɛ ɾ s t ɪ n WORD_BOUNDARY v a s WORD_BOUNDARY  ɪ s t WORD_BOUNDARY d a s WORD_BOUNDARY
k e r s t i n WORD_BOUNDARY w a s WORD_BOUNDARY i s t WORD_BOUNDARY d a s WORD_BOUNDARY