Thank you, tybalt89. Your code worked in terms of generating the expected output.

Could you please explain in detail the following 2 lines from your code? Thank you!

 
my ($cluster, $member) = split;
print $cluster eq $member ? "\n" x ($. > 1) : ', ', $member;

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In reply to Re^2: Processing while reading in input by onlyIDleft
in thread Processing while reading in input by onlyIDleft

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