| line | l | !l&&r | !l&&!r | condition | 
 
| 100 | 0 | 0 | 9 | defined $FITS_headers->{'CD1_1'} or defined $FITS_headers->{'CD1_2'} | 
 
|  | 0 | 0 | 9 | defined $FITS_headers->{'CD1_1'} or defined $FITS_headers->{'CD1_2'} or defined $FITS_headers->{'CD2_1'} | 
 
|  | 0 | 0 | 9 | defined $FITS_headers->{'CD1_1'} or defined $FITS_headers->{'CD1_2'} or defined $FITS_headers->{'CD2_1'} or defined $FITS_headers->{'CD2_2'} | 
 
|  | 0 | 0 | 9 | defined $FITS_headers->{'PC1_1'} or defined $FITS_headers->{'PC1_2'} | 
 
|  | 0 | 0 | 9 | defined $FITS_headers->{'PC1_1'} or defined $FITS_headers->{'PC1_2'} or defined $FITS_headers->{'PC2_1'} | 
 
|  | 0 | 0 | 9 | defined $FITS_headers->{'PC1_1'} or defined $FITS_headers->{'PC1_2'} or defined $FITS_headers->{'PC2_1'} or defined $FITS_headers->{'PC2_2'} |