use strict;
use warnings;

my @tmp;
my @keep;
my $first_time = 1;

while (my $a_line = <DATA>) {
	chomp $a_line;
	push @tmp, $a_line;
	if ( $a_line =~ /^\d+\s+\D+/ ) 
	{
		if ($first_time) 
		{
			$first_time = 0;
		}
		else 
		{
				#we have a new host master record
				#process the data from the previous host
			process_previous(\@tmp);
			@keep = (@keep, @tmp);
			@tmp =();
		}
	}
}

process_previous(\@tmp);
@keep = (@keep, @tmp);
@tmp=();

print "$_\n" for @keep;
exit(0);

#----------------- SUBS ----------------------------
sub process_previous {
	my $array_ref = shift;
	my $keep_this_data = 0;
	foreach my $elem(@$array_ref) 
	{
		if ($elem !~ /\d:\d:\d$/ ) 
		{
			$keep_this_data = 1;
			last;
		}
	}

	if (!$keep_this_data) 
	{
		#empty the array
		@$array_ref = ();
	}
}

__DATA__
7 hostname12 Generic-legacy 10000000AB210ACF6 ---
                             10000000AB210ACF4 2:5:4
                             10000000AB210ACF4 2:3:4
                             10000000AB210ACF6 3:5:4
9 hostname13 Generic        10000000AB2A3006A 3:5:2
                             10000000AB2A30068 2:5:2
23 srvernam   Generic-legacy 5001438002A3004A 3:3:3
                             5001438002A3004A ---
                             5001438002A30048 2:3:3
                             5001438002A30048 2:5:2
                             5001438002A30048 2:5:2
9 hostname13 Generic        10000000AB2A3006A 3:5:2
                             10000000AB2A30068 2:5:2
21 HOSTNAME   Generic
9 hostname13 Generic        10000000AB2A3006A 3:5:2
                             10000000AB2A30068 2:5:2