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  1. or download this
    C:\>perl -w -MStrict -le "Strict->import"

C:\>perl -w -MStrict -le "Strict->foo"
Can't locate object method "foo" via package "Strict" 
(perhaps you forgot to load "Strict"?) at -e line 1.
  2. or download this
    package FooBar;
require Exporter;
...
}

1;
  3. or download this
    #!/usr/bin/perl
use strict;
...
use FooBar qw(foo);

foo();
  4. or download this
    #!/usr/bin/perl
use strict;
...
use foobar qw(foo);

foo();