C11111333133313232233133313331333131133131133132313331311331323233313123231111   >>    C1111133313331323223313331333133313113313113313231333131133132323331312323111   <<    C11111333133313232233133313331333131133131133132313331311331323233313123231113   >>      C11111333133313232233133313331333131133131133132313331311331323233313123231112   >>