nani ni atta no kanaa
nani ni atta no kanaa ?
n a n i WORD_BOUNDARY n i WORD_BOUNDARY a t t a WORD_BOUNDARY n o WORD_BOUNDARY k a n aː WORD_BOUNDARY
n a n i WORD_BOUNDARY n i WORD_BOUNDARY a t t a WORD_BOUNDARY n o WORD_BOUNDARY k a n a a WORD_BOUNDARY