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  1. or download this
    #!/usr/bin/perl
use 5.020;
use strict;
...

my $read = <$ARTICLE>;
say "[$read]";
  2. or download this
    perl pipe.pl
'caesar' is not recognized as an internal or external command,
operable program or batch file.
Can't start caesar:
Inappropriate I/O control operation
The handle is invalid at pipe.pl line 7.