C31231211111133131211113313331333133313332233132313331322333131221   >>    C3123121111113313121111331333133313331333223313231333132233313122   <<    C31231211111133131211113313331333133313332233132313331322333131223   >>      C31231211111133131211113313331333133313332233132313331322333131222   >>