filter from a sharepoint folder - power query

HI,

use the following filter 

= Table.SelectRows(#"Changed Type", each  
    Text.StartsWith([Name], "Course") and  
    Text.EndsWith([Name], ".csv") and  
    Text.Length([Name]) >= 8 and  
    List.Contains({"0".."9"}, Text.Middle([Name], 6, 1)))

Before Filter

after filter