LSMW for not upload specific data

Hi

I am trying to create LSMW for Product Master in APO.

What I want to acheive is like this.

I would like to do following update in 1 file.

However I do not ALWAYS change following 2 data.

A. Update Safety Days Supply (SVTTY)

B. Update Procurement Type (BESKZ)

So I must create following text data.

MATNR LOCNO SVTTY BESKZ

T-P102  1000      10       E                  <-  I want to change both A & B

T-P101  1000      10                           <-  I want to change only A

T-P103  1000                 F                  <-  I want to change only B

[Question]

Now my question is if I want to achieve Line2 & 3, what should I enter for text file?

I tried blank and #.  However it is uploaded as blank.

Is it possible to upload like this?

Or should I separate file? (= create 2 LSMW)