naka ni haitteru no ka
naka ni haitteru no ka ?
n a k a WORD_BOUNDARY n i WORD_BOUNDARY h a i t t e r ɯ WORD_BOUNDARY n o WORD_BOUNDARY k a WORD_BOUNDARY
n a k a WORD_BOUNDARY n i WORD_BOUNDARY h a i t t e r u WORD_BOUNDARY n o WORD_BOUNDARY k a WORD_BOUNDARY