How to solve a Rubik's cube 5х5 - Step 8

Step 8.

In the end of this step there should be solved all layers except the upper one and the upper cross.

In the beginning of this step the pieces of the upper cross should be in their place. At the same time their colors should be upturned. You can have one of the following pictures. All pieces of the upper cross are turned wrong or

Variant 1
2 adjacent threes are turned wrong
Variant 2
or 2 opposite threes are turned wrong

Here is everything analogous to the step 5 from the algorithm for the cube 3x3.
You should carry out the algorithm twice and between them rotate the upper face necessary number of turns.

R ud R ud R ud R ud

If all the threes are turned wrong, just do this step twice.