InputCSV to Textfile output

Dear All,

I am quite new to Pentaho and I need some help as beginner:

I have CSV input data with the follwing fields (columns): colummn1, column 2, column3, column4, column5

In the Text output filed I need to get the following fields: columnn1, column 2, column3, Column 6, Column 7

Basically in the textoutput, I am mapping the fields column1 to column3 from CSV and removing column4, column5.

But my problem is how to add new columns: column 6 & column 7 with NULL values?

any suggestions?

regards,
Rama