Hello everyone. I am new to programing and new to PERL as well of course. I needed to write a script to extract some information from a large sized file. My file looks like 

# BLASTP 2.2.28+
# Query: gi|338220664|gb|EGP06123.1| hypothetical protein GEW_00005 [P
+asteurella multocida subsp. gallicida str. Anand1_poultry]
# Database: nr-25sep
# Fields: query id, subject id, % identity, alignment length, mismatch
+es, gap opens, q. start, q. end, s. start, s. end, evalue, bit score
# 2 hits found
gi|338220664|gb|EGP06123.1|    gi|45383702|ref|NP_989542.1|    45.15  
+  206    96    7    3    204    28    220    1e-51     170
gi|338220664|gb|EGP06123.1|    gi|15419940|gb|AAK97214.1|    44.17    
+206    98    7    3    204    28    220    5e-50     166
# BLASTP 2.2.28+
# Query: gi|338220666|gb|EGP06125.1| hypothetical protein GEW_00015 [P
+asteurella multocida subsp. gallicida str. Anand1_poultry]
# Database: nr-25sep
# 0 hits found
# BLASTP 2.2.28+
# Query: gi|338220651|gb|EGP06111.1| hypothetical protein GEW_00275 [P
+asteurella multocida subsp. gallicida str. Anand1_poultry]
# Database: nr-25sep
# 0 hits found

[download]

I basically want to extract the "query line" particularly the number after "gi" in the query line only of those that have 0 hits. So in this case my matching line would be "# 0 hits found". I have wrote a small script which extract the matching line but i am unable to extract the query line and the number after gi in the query line. My code is 

sub getGI
{
open(FILE, "twentySeq1e-10.out") or die("Cannot open file");
while(<FILE>)
{
my $line = $_;

if($line=~/# 0 hits found/)
{
print "$line\n";
}
}
}

[download]

The desired output which I want is the number after "gi" in the query line, only of those having 0 hits. For example in this case the output would be 

338220666
338220651

[download]

The "query" line is 2line before the matching line. If some one could help me with this I would be grateful. Thanks

In reply to Print a previous to previous of a matching line by ag88

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