a koko no taiya nai na
a koko no taiya nai na .
a WORD_BOUNDARY k o k o WORD_BOUNDARY n o WORD_BOUNDARY t a i j a WORD_BOUNDARY n a i WORD_BOUNDARY n a WORD_BOUNDARY
a WORD_BOUNDARY k o k o WORD_BOUNDARY n o WORD_BOUNDARY t a i y a WORD_BOUNDARY n a i WORD_BOUNDARY n a WORD_BOUNDARY