Had a bit of fun with this. I'm sure there is a much shorter and better way, but alas, it is what it is :) Using your data:
#!/usr/bin/perl
use warnings;
use strict;
my @hold;
my @data;
while ( my $line = <DATA> ){
chomp $line;
if ( $line =~ /NIL$/ || $line !~ /\w+/ ){
if ( scalar @hold > 1 ){
push @data, [ @hold ];
}
undef @hold;
next;
}
push @hold, $line;
}
for my $block ( @data ){
for my $entry ( @{ $block } ){
print "$entry\n";
}
print "\n";
}
EDIT: Fixed code so it would work with more than two consecutive lines.
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