koko ikeru ka zuu tto
koko ikeru ka zuu tto ?
k o k o WORD_BOUNDARY i k e r ɯ WORD_BOUNDARY k a WORD_BOUNDARY z ɯː WORD_BOUNDARY t t o WORD_BOUNDARY
k o k o WORD_BOUNDARY i k e r u WORD_BOUNDARY k a WORD_BOUNDARY z u u WORD_BOUNDARY t t o WORD_BOUNDARY