unless ( ($zip) = ($field5 =~ /(\d{5}-\d{4})/)) {
                unless ( ($zip) = ($field5 =~ /(\d{5})/)) {
                        unless ( ($zip) = ($field4 =~ /(\d{5}-\d{4})/)) {
                                ($zip) = ($field4 =~ /(\d{5})/);         
                        }                                       
                }        
        }