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blackboard verbs |
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| READ | BLACKBOARD | Display all messages on blackboard |
| WRITE | BLACKBOARD; {message} | Used to add a message to the blackboard. |
| NUDGE | BLACKBOARD | Used to rotate through the messages to the one you wish to erase. |
| RUB | BLACKBOARD | Used to erase a message from the blackboard. |
| SCRATCH | BLACKBOARD | Used to change sequence of messages on the blackboard. |
| LOOK | BLACKBOARD | Provides help. |