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   use Data::Dumper;
   my @test = qw/hello world/;
   print Dumper( map { s/o//     } @test ), "\n";
   print Dumper( map { s/o//; $_ } @test ), "\n";

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$VAR1 = 1;
$VAR2 = 1;

$VAR1 = 'hell';
$VAR2 = 'wrld';