How to skip only some characters while loading master data in to BPC NetWeaver on Very first time

Hi Experts,

I need to load data from flat file for Account dimension, but here in flat file there are some texts are there in starting which i need to remove for example ..

IN Flat file value is in below given format ..

Please note that i can handle this with ..

js: %external%.replace("Abcd","")

if you have constant prefix...

P.S. Even better - to search only in the beginning of the string (using regular expression):

js: %external%.replace(/^Abcd/,"")

^ - beginning of the string

but in my case i am loading data very fist time so i can not user conversion file ..

Thanks,

Ravi