SIDES=sides-layout-value

    Specifies whether your job will print on one or two sides of a sheet,
    and whether it will print in tumble mode. Sides-layout-value can be:

    1, ONE, or           Your job is printed on one side of the sheet.
    ONE_SIDED_SIMPLEX

    2, TWO, or           Your job is printed on both sides of a sheet.
    TWO_SIDED_DUPLEX

    TUMBLE or            Your job is printed on both sides of the sheet,
    TWO_SIDED_TUMBLE     and alternating pages are rotated 180°.

    ONE_SIDED_DUPLEX     Your job prints on one side of the sheet.
                         This setting reflects the placement of
                         margins.

    ONE_SIDED_TUMBLE     Your job prints on one side of the sheet.
                         Alternating pages are rotated 180°.  This
                         setting reflects the placement of margins.

    TWO_SIDED_SIMPLEX    Your job is printed on both sides of a sheet.
                         This setting does not reflect the placement of
                         margins.

    The SIDES command is overridden if the file contains an operator that
    sets the duplex value.