C11111333133313232233133313331333131133132313331322121111133313232223321   >>    C1111133313331323223313331333133313113313231333132212111113331323222332   <<    C11111333133313232233133313331333131133132313331322121111133313232223323   >>      C11111333133313232233133313331333131133132313331322121111133313232223322   >>