nadan nadan nadan nadan nadan
nada nada nada nada nada
v v v v v
nadan nadan nadan nadan nadan .
n a d a n WORD_BOUNDARY n a d a n WORD_BOUNDARY n a d a n WORD_BOUNDARY n a d a n WORD_BOUNDARY n a d a n WORD_BOUNDARY
n a d a n WORD_BOUNDARY n a d a n WORD_BOUNDARY n a d a n WORD_BOUNDARY n a d a n WORD_BOUNDARY n a d a n WORD_BOUNDARY . WORD_BOUNDARY