se abre el libro
se abre el libro .
s e̞ WORD_BOUNDARY a β ɾ e̞ WORD_BOUNDARY e̞ l WORD_BOUNDARY l i β ɾ o̞ WORD_BOUNDARY
s e WORD_BOUNDARY a b r e WORD_BOUNDARY e l WORD_BOUNDARY l i b r o WORD_BOUNDARY . WORD_BOUNDARY