C11111333133313232233133313331333131133132233133313123231313221   >>    C1111133313331323223313331333133313113313223313331312323131322   <<    C11111333133313232233133313331333131133132233133313123231313223   >>      C11111333133313232233133313331333131133132233133313123231313222   >>