How to create a list of permutations?

Hi,

I can't quite figure out how to turn my list of examples:

• Row  Value
• 1  a
• 2  b
• 3  c
• 4 ..etc

into a list of permutations, like:

• Row  Value
• 1  a
• 2  b
• 3  c
• 4 ab
• 5 abc
• 6 ba
• 7 bac
• 8 bca
• 9.. etc

I can transpose and use Loop Attribute Subset, but this will give me combinations not permutations.

Can anyone help please?  ???