rinrin rinrin tte natteru
rinrin rinrin tte natteru ?
r i n r i n WORD_BOUNDARY r i n r i n WORD_BOUNDARY t t e WORD_BOUNDARY n a t t e r ɯ WORD_BOUNDARY
r i n r i n WORD_BOUNDARY r i n r i n WORD_BOUNDARY t t e WORD_BOUNDARY n a t t e r u WORD_BOUNDARY