a dónde van a comprar
a dónde van a comprar ?
a WORD_BOUNDARY ð o n d e WORD_BOUNDARY β a n WORD_BOUNDARY a WORD_BOUNDARY k o m p ɾ a ɾ WORD_BOUNDARY
a WORD_BOUNDARY d ó n d e WORD_BOUNDARY v a n WORD_BOUNDARY a WORD_BOUNDARY c o m p r a r WORD_BOUNDARY