If I understand correctly you want to parse a file that looks like this:

a 
b
c 

d
e
f
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Depending on the size of the file I would read it all into a string and slit on /^\n/.

open(FILE,"<some.file");
$string = <FILE>;
@array = split(/^\n/,$string); # split where the \n is the first thing
+ on that line.
# then do stuff with each element in @array.
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-Silent11