Sorting with empty cells

R

Ricoy-Chicago

I have the following data:

1
blank
4
blank

and I want to sort it as:
1
blank (position 2)
blank (position 3)
4

When I sort, I end with:
blank or 1
blank 4
4 blank
1 blank

Basically, the value of the cell should be the position in the sorting data.
Any help will be greatly appreciated.

Thanx.
 
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