a nani katte kita no
a nani katte kita no ?
a WORD_BOUNDARY n a n i WORD_BOUNDARY k a t t e WORD_BOUNDARY k i t a WORD_BOUNDARY n o WORD_BOUNDARY
a WORD_BOUNDARY n a n i WORD_BOUNDARY k a t t e WORD_BOUNDARY k i t a WORD_BOUNDARY n o WORD_BOUNDARY