Generate an output of aligned sequences. 
Provision is made for mapping strings depending on either the composition 
(A, L, V, and I print as ``green'', Y, F, and T print as ``yellow'') or 
on the highlighted patterns.  
If you prefix the file name with an equals sign (``=''),
the file will be searched for in the MASE directory 
(currently ``/usr/public/mase/'').
OUTPUT-ALIGNED will display the number of the page being written.
This is done to give the user something to watch lest he thinks MASE is idle.
See ``MAPPING FOR OUTPUT'' in FILE FORMATS for information on the format
of mapping files.  OUTPUT-ALIGNED references the 
INTERNAL VARIABLES ``BASES-PER-COLUMN'', ``BASES-PER-PAGE'',
``LABEL-EACH-PAGE'', ``OUTPUT-POSITION'', ``PAGE-LENGTH'', and ``SKIP-LINES''
to modify the output style.