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my $fee="FEE"
my $fi="FI"
my $fo="FO"
my @fum=qw / fee fi fo fum /

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use Data::Dumper;
use warnings;
...


print Dumper($main::fee,$fi,$fo,@fum);

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 perl loadData.pl
Name "main::fum" used only once: possible typo at loadData.pl line 15.
...
$VAR1 = undef;
$VAR2 = undef;
$VAR3 = undef;

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[pberghol@cowdawg ext-files]$ perl loadData.pl
Global symbol "$fi" requires explicit package name at loadData.pl line
+ 16.
Global symbol "$fo" requires explicit package name at loadData.pl line
+ 16.
Global symbol "@fum" requires explicit package name at loadData.pl lin
+e 16.
Execution of loadData.pl aborted due to compilation errors.

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perl loadData.pl
Name "main::fum" used only once: possible typo at loadData.pl line 16.
...
$VAR1 = undef;
$VAR2 = undef;
$VAR3 = undef;