Filtering out

[memela]

Hi!

I have this data, want to filter some data out in the dimensions . The example of the data is displayed below. Example, from Grade 200, I would like to filter out level 2 and 3 and from grade 410 I would like to filter out 3 and 4 and so on.

Please help

Grade	Level
200	1
200	2
200	4
200	6
200	8
410	1
410	3
410	4
410	6
600	1
600	2
600	3
600	4