It also depends on scratches because they have to climb up and change the numbers on top of the gate. If there were 12 entered but the 3 scratches they would rather move the 1 & 2 one position out instead of moving 4 - 12 each one position in.
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“If you want to outwit the devil, it is extremely important that you don't give him advanced notice."
~Alan Watts
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