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#!/usr/bin/perl
use strict;
use warnings;
my $variable = 10;
my $reference = \$variable;
print( "\$variable = $variable\n" );
print( "\$reference = $reference\n" );
print( "\$\$reference = $$reference\n" );
$$reference++;
print( "\$variable = $variable\n" );
print( "\$reference = $reference\n" );
print( "\$\$reference = $$reference\n" );
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