Copy user mentioned column from first sheet to another mentioned column in second sheet

Dear Friends,

Here is the problem statement:
I have the first data sheet called "data" which has multiple columns. I want to copy certain columns from this sheet to H1 and H2 depending upon the mapping provided in the mapping sheet.

If the mapping looks like:
From Data to H1
B A
then i want to copy the contents of column B from "data" sheet to column A of "H1" sheet

I have uploaded the excel doc on how the output should look like.

Would appreciate if someone can share macro/sample code/sample excel sheet on how to do this.

Regards
rpatil