C11111333133313232233133313331333133313221333133313232212111133131133113121   >>    C1111133313331323223313331333133313331322133313331323221211113313113311312   <<    C11111333133313232233133313331333133313221333133313232212111133131133113123   >>      C11111333133313232233133313331333133313221333133313232212111133131133113122   >>