C11111333133313232233133313331333133313331323331333131122233121   >>    C1111133313331323223313331333133313331333132333133313112223312   <<    C11111333133313232233133313331333133313331323331333131122233123   >>      C11111333133313232233133313331333133313331323331333131122233122   >>