ach was hat er denn
ach was hat er denn ?
 a x WORD_BOUNDARY v a s WORD_BOUNDARY h a t WORD_BOUNDARY  ɛ ɾ WORD_BOUNDARY d ɛ n WORD_BOUNDARY
a c h WORD_BOUNDARY w a s WORD_BOUNDARY h a t WORD_BOUNDARY e r WORD_BOUNDARY d e n n WORD_BOUNDARY