,@,,,,,,,@                                          @,@@@,@,,,
,@@,,,,,,@                                          ,@@,,@@@,,
,@,@,,,,,@                                          ,@,@,@,,@,
,@@@@,,,,@                                          ,@@@@@@,@@
@@,,,@,,,@                                          @@,,,,,@@,
@,@,,@@,,@                                     ,    ,,@,,,,@,@
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@@,,@@@@@@                                    , ^,  ,,@,@,,@,,
@,@,@,,,,, gull call.                    ,      , ^ ,,@@@@,@@,
@@@@@@,,,, ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ @,@,,,@@,@
,,,,,,@,,,                                          @@@@,,@,@@
@,,,,,@@,, the seagull  is  a metaphysics trick;  a @,,,@,@@@,
@@,,,,@,@, world-builder's  shortcut,  to  define a ,@,,@@@,,@
,,@,,,@@@@ section of reality and imply  its  size: @@@,@,,@,@
@,@@,,@,,, place  a flock of birds at  the edge and @,,@@@,@@@
,@@,@,@@,, make  their  calls  tesselate  over  the ,@,@,,@@,,
,@,@@@@,@, entire volume                            ,@@@@,@,@,
,@@@,,,@@@                                          @@,,,@@@@@
@@,,@,,@,, a  seagull can be defined  by as  little ,,@,,@,,,,
@,@,@@,@@, as  five  vertices;  six  triangles.  (i @,@@,@@,,,
@@@@@,@@,@ would  recommend  handling in  swarms of @@@,@@,@,,
@,,,,@@,@@ at least a dozen birds.)                 ,,,@@,@@@,
@@,,,@,@@,                                          @,,@,@@,,@
,,@,,@@@,@                                          ,@,@@@,@,@
@,@@,@,,@@                                          ,@@@,,@@@@
,@@,@@@,@,                                          @@,,@,@,,,
,@,@@,,@@@                                          ,,@,@@@@,,