la cadena es ésta
la cadena es ésta .
l a WORD_BOUNDARY k a d e̞ n a WORD_BOUNDARY e̞ s WORD_BOUNDARY e̞ s t a WORD_BOUNDARY
l a WORD_BOUNDARY c a d e n a WORD_BOUNDARY e s WORD_BOUNDARY é s t a WORD_BOUNDARY . WORD_BOUNDARY