C11111333133313232233133313331333132313331333132213331312323221   >>    C1111133313331323223313331333133313231333133313221333131232322   <<    C11111333133313232233133313331333132313331333132213331312323223   >>      C11111333133313232233133313331333132313331333132213331312323222   >>