nan no koto itteru no
nan no koto itteru no ?
n a n WORD_BOUNDARY n o WORD_BOUNDARY k o t o WORD_BOUNDARY i t t e r ɯ WORD_BOUNDARY n o WORD_BOUNDARY
n a n WORD_BOUNDARY n o WORD_BOUNDARY k o t o WORD_BOUNDARY i t t e r u WORD_BOUNDARY n o WORD_BOUNDARY