Input file for a large 3D cartesian grid
40000 1000 5  'Old' 'm' .F.  
Regions
4                                          
'RESRO'
'UPPER'
'cartesian'     'm'
0.0e0 2.0e2 0.0e0 1.0e0 8.0e1 1.0e2
'BOTTM'
'cartesian'   'm'
0.0e0 2.0e2 0.0e0 1.0e0 0.0e0 2.0e1
'FLOWP'
'cartesian'   'm'
0.0e0 2.0e2 0.0e0 1.0e0 49.95e0 50.05e0
XYZ
      00.0    0.0e00    0.0e00    0.0e00
NX      40      1.0e1
NY       1      1.0e0
NZ    1000      0.1e0