ach fest halt fest ach
ach fest halt fest ach !
 a x WORD_BOUNDARY f ɛ s t WORD_BOUNDARY h a l t WORD_BOUNDARY f ɛ s t WORD_BOUNDARY  a x WORD_BOUNDARY
a c h WORD_BOUNDARY f e s t WORD_BOUNDARY h a l t WORD_BOUNDARY f e s t WORD_BOUNDARY a c h WORD_BOUNDARY