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my @word_count = ();
@word_count = split(/\s/, $file);      # Find out how many words are i
+n abstracts.
my $word_number = scalar(@word_count);

adenosine-5'-triphosphate levels    0
h(2)O(2)    0
...
deltapsi(m)    0
pirin(Sm)    0
rho(0)    0