C11111333133313232233133313331333133313332322331331122132313121   >>    C1111133313331323223313331333133313331333232233133112213231312   <<    C11111333133313232233133313331333133313332322331331122132313123   >>      C11111333133313232233133313331333133313332322331331122132313122   >>