a Kakka no ka ga atta ka
a kakka no ka ga atta ka .
a WORD_BOUNDARY k a k k a WORD_BOUNDARY n o WORD_BOUNDARY k a WORD_BOUNDARY g a WORD_BOUNDARY a t t a WORD_BOUNDARY k a WORD_BOUNDARY
a WORD_BOUNDARY k a k k a WORD_BOUNDARY n o WORD_BOUNDARY k a WORD_BOUNDARY g a WORD_BOUNDARY a t t a WORD_BOUNDARY k a WORD_BOUNDARY