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use strict;

...
123,456,"hello, world, goodbye, world",789,"foo, bar","bar, foo"
"hello, world","goodbye, world",123,"foo"
"hello" 123,456,"goodbye, world",789

map{$a=1-$_/10;map{$d=$a;$e=$b=$_/20-2;map{($d,$e)=(2*$d*$e+$a,$e**2
-$d**2+$b);$c=$d**2+$e**2>4?$d=8:_}1..50;print$c}0..59;print$/}0..20