C11111333133313232233133313331333133313231322321111331323222233121   >>    C1111133313331323223313331333133313331323132232111133132322223312   <<    C11111333133313232233133313331333133313231322321111331323222233123   >>      C11111333133313232233133313331333133313231322321111331323222233122   >>