C111112111133131121133133313331333133313331323133313331333133313233312121221   >>    C11111211113313112113313331333133313331333132313331333133313331323331212122   <<    C111112111133131121133133313331333133313331323133313331333133313233312121223   >>      C111112111133131121133133313331333133313331323133313331333133313233312121222   >>