a nani ga kowareta ka na
a nani ga kowareta ka na ?
a WORD_BOUNDARY n a n i WORD_BOUNDARY g a WORD_BOUNDARY k o w a r e t a WORD_BOUNDARY k a WORD_BOUNDARY n a WORD_BOUNDARY
a WORD_BOUNDARY n a n i WORD_BOUNDARY g a WORD_BOUNDARY k o w a r e t a WORD_BOUNDARY k a WORD_BOUNDARY n a WORD_BOUNDARY