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  1. or download this
    $ perl -E 'my $x = sub { say "@_" }; $x->("fred")'
fred
  2. or download this
    $ perl -E 'my $x = sub { say "@_" }; $x("fred")'
syntax error at -e line 1, near "$x("
Execution of -e aborted due to compilation errors.
  3. or download this
    $ perl -E 'my $x = sub { say "@_" }; "XYZ"->$x("fred")'
XYZ fred