son la es una letra
son la es una letra .
s o̞ n WORD_BOUNDARY l a WORD_BOUNDARY e̞ s WORD_BOUNDARY u n a WORD_BOUNDARY l e̞ t ɾ a WORD_BOUNDARY
s o n WORD_BOUNDARY l a WORD_BOUNDARY e s WORD_BOUNDARY u n a WORD_BOUNDARY l e t r a WORD_BOUNDARY . WORD_BOUNDARY