Populate Stream Field with mulitple column/fields?

Looking for a way to get a list of values from a CSV that are multiple fields/columns - and the number of Columns are not fixed. This example may help:

Column1 Column2 Column3 Column4 Column 5 Column6
nic01 nic02 nic03 nic04 nic05 nic06
nic02 nic03
nic01 nic02 nic03 nic04 nic05 nic06
nic04 nic05 nic06 nic07 nic08 nic09

I would like to populate a Stream Field, which I will sort and get "unique" values. My question is how can I get a stream field with all values

Interfaces:
nic01
nic02
nic03
nic04
nic05
nic06
nic07
nic08
nic09

Hope that makes sense. Thanks in advance!

KP