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sub file {
    my $self = shift;
    @_ ? $self->{file} = shift 
       : $self->{file};
}

perl -e 'print "How sweet does a rose smell? "; chomp ($n = <STDIN>); 
+$rose = "smells sweet to degree $n"; *other_name = *rose; print "$oth
+er_name\n"'