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The reader moves items and the arrangement they leave behind is their answer. Nothing is computed. What the carrier supplies is a low cost of trying an order, so the fifth arrangement gets attempted instead of the first one being defended. Keep a way back to the starting order, because that is what makes experimenting cheap.

The reader moves items and the arrangement they leave behind is their answer. Nothing is computed. What the carrier supplies is a low cost of trying an order, so the fifth arrangement gets attempted instead of the first one being defended. Keep a way back to the starting order, because that is what makes experimenting cheap.

Example

Best when the ordering or grouping is the thing in question and no formula can settle it.