selected values in report

Hi,

We have  Material hierarchy variable (PRO_VAR) in BEx query I want to display selected product key values in report.

Below is the product data

I am using below formula to display its key values (in single cell)

=Replace("XY"+upper(UserResponse("PRO_VAR"));";";";XY")

It is displaying XYBISCUITS;XYDIARYMILK;XYCHOC

But i am expecting all key values like below (nospaces and restrict to 8 chars)

XYBISCUITS;XYDIARYMIL;XYCHOC

Could you please help me on this logic please..!!

Thank you,

suri