Drawers

the contestant goes to the counter to insert a file in a line in order to advance other files among which is the key. For each file inserted, a file will become available at the exit desk. to cross the central partition by passing through 2 successive drawers in order to access the exit window. Once recovered, he must follow the same path in order to bring this file back to the entry counter and insert it in the queue to continue to advance the key.