$SUBSCF group      (relevant during Divide and Conquer)
$SUBCOR group
 
    These groups specify the central and buffer regions
when SUBTYP=CARD or BUFTYP=CARD in $DANDC. $SUBSCF is used
for DC SCF and $SUBCOR is for DC-MP2/CC. If BUFTYP is not
CARD, only central region is specified by these groups.
They consist of free format integer numbers of which the
style is like this:
 
 $SUBSCF
! SUBSYSTEM     1
  1  3 -5  0
  2  6 -8  0 0
! SUBSYSTEM     2
  2  6 -9 11  0
  1  3  4  10  12 -14 0 0
! SUBSYSTEM     3
  ...
 $END
 
Lines starting with ! are comments neglected when reading.
 
First, atoms in the central region of subsystem 1 is
specified according to the (b) style of LBSUBS in $DANDC.
A single 0 separates the central and buffer region of the
same subsystem. Then, specify atoms in the buffer region of
subsystem 1.  A double 0 separates subsystems. These are
iterated until all subsystems are specified.
 
    In the above case, the subsystems are the followings:
 
Subsystem 1 central: 1,3,4,5
            buffer : 2,6,7,8
Subsystem 2 central: 2,6,7,8,9,11
            buffer : 1,3,4,10,12,13,14
 
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