The padlock is opened, locked with a key:
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Doorbell, knock on the door
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Creaking wooden door
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Pneumatic door mechanism
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Shower door open, close
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Closes, The wooden door opens
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Wooden door and hinges creak, the door closes
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Pulling a doorknob
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The wooden door opens
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The plastic door opens, closes
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Creaking metal door
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Closes, The door shutters opens
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Turn the lock on the door
★★★★★