an der an der Wand
an der an der wand ?
 a n WORD_BOUNDARY d ɛ ɐ WORD_BOUNDARY  a n WORD_BOUNDARY d ɛ ɐ WORD_BOUNDARY v a n t WORD_BOUNDARY
a n WORD_BOUNDARY d e r WORD_BOUNDARY a n WORD_BOUNDARY d e r WORD_BOUNDARY w a n d WORD_BOUNDARY