D11313232233131133132213231323131123313232233133311221123231323222311   >>    D1131323223313113313221323132313112331323223313331122112323132322231   <<    D11313232233131133132213231323131123313232233133311221123231323222313   >>      D11313232233131133132213231323131123313232233133311221123231323222312   >>