Every year, professional classifiers at West Group manually classify over 350,000 headnotes, or abstracts of judicial opinions, across approximately 82,000 separate classes of the Key Number System. The reference information is distributed across a plurality of sub-databases. The return flowpath for formation fluids andor treatment fluids is through the annulus between the coiled tubing and the production tubing. Whenever an activity completes, its code or word is removed from the list regardless of its location in the list, and in such a way as to preserve the order of the remaining entries in the list. The circuit board is mounted adjacent to the solenoid valve and oriented generally parallel to the solenoid and service port. This composition is efficacious in improving intestinal flora, alleviating abdominal ailments in association with the intake of milk, and preventing metabolic bone diseases.