#ex_08-1
#Learning Perl Appendix A, Exercise 8.1
sub card {
    my %card_map;
    @card_map{1..9} = qw(
        one two three four five six seven eight nine
    );
    my($num) = @_;
    if ($card_map{$num}) {
       return $card_map{$num};
    } else {
      return $num;
    }
}
# driver routine:
while (<>) {
    chomp;
    print "card of $_ is ", &card($_), "\n";
}