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  1. or download this
       $str = q!AND (random text) AND (more random text) AND (yet more)!;
   $str = q!OR (random text) OR (more random text) OR (yet more)!;
  2. or download this
      while ($str =~ /\G(AND|OR)\s+(.+?)/g) {
     printf("%s %s\n", $1, $2);
  }
  3. or download this
      while ($str =~ /\G(AND|OR)\s+(\(.+?\))/g) {
     printf("%s %s\n", $1, $2);
  }
  4. or download this
       $str = q!AND (random text) AND (yet (more))!;