Kakka wa doko kara iku no
kakka wa doko kara iku no ?
k a k k a WORD_BOUNDARY w a WORD_BOUNDARY d o k o WORD_BOUNDARY k a r a WORD_BOUNDARY i k ɯ WORD_BOUNDARY n o WORD_BOUNDARY
k a k k a WORD_BOUNDARY w a WORD_BOUNDARY d o k o WORD_BOUNDARY k a r a WORD_BOUNDARY i k u WORD_BOUNDARY n o WORD_BOUNDARY