my $group = shift or die $usage;
my $nntp = Net::NNTP->new($ENV{NNTPSERVER} || '127.0.0.1');
my ($num, $first, $last) = $nntp->group($group);
die "Invalid group\n" if !(defined $num && defined $first && defined $last);
my $arg_first = shift;
if (defined $arg_first) {
my $group = shift or die $usage;
my $nntp = Net::NNTP->new($ENV{NNTPSERVER} || '127.0.0.1');
my ($num, $first, $last) = $nntp->group($group);
die "Invalid group\n" if !(defined $num && defined $first && defined $last);
my $arg_first = shift;
if (defined $arg_first) {