!----------------------------------------------------------------------------------
!  Family                nz        jbeg,jend          kbeg,kend           lbeg,lend
!----------------------------------------------------------------------------------
                wall      1           1     -1           1     -1           1      1
                 far      1           1     -1           1     -1          -1     -1
                 sym      1           1     -1           1      1           1     -1
                 sym      1           1     -1          -1     -1           1     -1