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  1. or download this
    #!/tool/bin/perl -w
    use strict;
    ...
    use Xyzzy;
    
    say_it();
    
  2. or download this
    Undefined subroutine &main::say_it called at ./xyzzy_version_test.pl l
    +ine 6.
    
  3. or download this
    use Exporter qw(import);
    
    our @EXPORT = qw(say_it);
    
    our @EXPORT_OK = qw();