kono naka ni haitte ita n da
kono naka ni haitte ita n da .
k o n o WORD_BOUNDARY n a k a WORD_BOUNDARY n i WORD_BOUNDARY h a i t t e WORD_BOUNDARY i t a WORD_BOUNDARY n WORD_BOUNDARY d a WORD_BOUNDARY
k o n o WORD_BOUNDARY n a k a WORD_BOUNDARY n i WORD_BOUNDARY h a i t t e WORD_BOUNDARY i t a WORD_BOUNDARY n WORD_BOUNDARY d a WORD_BOUNDARY