0 400   0   # Default=0
 0 400   0   a
 1 400   0   
 0 400   0   # Comment=1
 1 400   0   
 1 400   0   
 0 400   0   # Heading=2
 2 400   0 + [heading]
 1 401   0 | 
 1 401   0 | 
 0 401   0 | # Assignment=3
 0 401   0 | =
 1 401   0 | 
 0 401   0 | # Default Value=4
 0 401   0 | @
 1 401   0 | 
 0 401   0 | # Key=5
 0 401   0 | key=
 1 401   0 | 
 0 401   0 |