ach wenn es klingelt
ach wenn es klingelt .
 a x WORD_BOUNDARY v ɛ n WORD_BOUNDARY  ɛ s WORD_BOUNDARY k l ɪ ŋ ə l t WORD_BOUNDARY
a c h WORD_BOUNDARY w e n n WORD_BOUNDARY e s WORD_BOUNDARY k l i n g e l t WORD_BOUNDARY