a koko kara koo iku to
a koko kara koo iku to .
a WORD_BOUNDARY k o k o WORD_BOUNDARY k a r a WORD_BOUNDARY k oː WORD_BOUNDARY i k ɯ WORD_BOUNDARY t o WORD_BOUNDARY
a WORD_BOUNDARY k o k o WORD_BOUNDARY k a r a WORD_BOUNDARY k o o WORD_BOUNDARY i k u WORD_BOUNDARY t o WORD_BOUNDARY