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1. Use Artist_of to refer to the name of group
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2. Decide which end or the rack is to be the start of
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alphabetic sequence, and call the first slot alpha
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3. Call the slot next to alpha, beta
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4. If Artist_of the CD in the alpha slot is later in
the
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alphabet than the Artist_of the CD in the beta slot,
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interchange the CDs, otherwise continue on
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5. If a slot follows the beta slot, begin calling it the
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beta slot and go to step 4, otherwise continue on
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6. If two slots follow the alpha slot, begin calling the
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next one the alpha slot and the one following it the
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beta slot, and go to step 4; otherwise stop
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