ara nani ga atta kanaa
ara nani ga atta kanaa ?
a r a WORD_BOUNDARY n a n i WORD_BOUNDARY g a WORD_BOUNDARY a t t a WORD_BOUNDARY k a n aː WORD_BOUNDARY
a r a WORD_BOUNDARY n a n i WORD_BOUNDARY g a WORD_BOUNDARY a t t a WORD_BOUNDARY k a n a a WORD_BOUNDARY