ach im Buch ach im Buch
ach im buch ach im buch .
 a x WORD_BOUNDARY  ɪ m WORD_BOUNDARY b uː x WORD_BOUNDARY  a x WORD_BOUNDARY  ɪ m WORD_BOUNDARY b uː x WORD_BOUNDARY
a c h WORD_BOUNDARY i m WORD_BOUNDARY b u c h WORD_BOUNDARY a c h WORD_BOUNDARY i m WORD_BOUNDARY b u c h WORD_BOUNDARY