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Hal was scanned and the lights brought to a low level as he passed through the opaque door to his apartment.  He stripped his coat and held it out sideways without breaking stride.  By the time he let go of his coat, a laundering arm had already grabbed it and pulled it through the wall and was currently removing all traces of pollutant, radiation, and ring around the collar.  Hal did the same with his boots, shirt, pants and socks.  At the end of what seemed like an unnaturally long hallway appeared shower heads, today arranged on three sides as well as above, having sensed Hal's stressful day.