small change
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@ -4,14 +4,9 @@ sort
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CardinalDirection = struct north | east | south | west;
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map
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oppositeDirection: CardinalDirection -> CardinalDirection;
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nextDirection: CardinalDirection -> CardinalDirection;
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eqn
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oppositeDirection(north) = south;
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oppositeDirection(south) = north;
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oppositeDirection(east) = west;
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oppositeDirection(west) = east;
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nextDirection(north) = east;
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nextDirection(east) = south;
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