a okkina okao ni natta
a okkina okao ni natta .
a WORD_BOUNDARY o k k i n a WORD_BOUNDARY o k a o WORD_BOUNDARY n i WORD_BOUNDARY n a t t a WORD_BOUNDARY
a WORD_BOUNDARY o k k i n a WORD_BOUNDARY o k a o WORD_BOUNDARY n i WORD_BOUNDARY n a t t a WORD_BOUNDARY