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#! perl -sw
use strict;
...
word1 AND word2 AND word3
(word1 AND word2 OR word3) AND NOT (word4 OR word5)
(word1 AND (word2 OR (word3 AND word4 AND NOT word5)) AND word6) OR wo
+rd7

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D:\Perl\test>268325
word1 AND word2
...

(word1 OR (word2 OR (word3 AND word4 AND NOT word5)) AND word6) OR wor
+d7
(word1 (word2 (+word3 +word4 -word5)) +word6) word7