C11111333133313232233133313331333133313221333133313232213331312321   >>    C1111133313331323223313331333133313331322133313331323221333131232   <<    C11111333133313232233133313331333133313221333133313232213331312323   >>      C11111333133313232233133313331333133313221333133313232213331312322   >>