Kakka wa nani kaku no
kakka wa nani kaku no ?
k a k k a WORD_BOUNDARY w a WORD_BOUNDARY n a n i WORD_BOUNDARY k a k ɯ WORD_BOUNDARY n o WORD_BOUNDARY
k a k k a WORD_BOUNDARY w a WORD_BOUNDARY n a n i WORD_BOUNDARY k a k u WORD_BOUNDARY n o WORD_BOUNDARY