In a short while! We are in the penultimate step. Four edges and perfectly located and oriented we go now the top vertices. But this step is only going to be interested in the position they occupy corresponding, ie, we will not guide them yet.
First let's review one by one the four corners and see if anyone is in place. This we will determine the color of the remaining faces (which should match the surrounding faces.)
Where to find one, let's turn all the cube, so as to leave this in the lower right corner, ie, sticking us.
However, this procedure causes the corners to rotate between them in respect counterclockwise, so maybe we should repeat once or twice until they are all in place.
The algorithm for this step is:
Ar-De- Ari - Izi - Ar - Dei - Ari - Iz
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