a

a
b
a
c

The list provided is:

- a
- a
- b
- a
- c

I'm not sure what you're asking. Could you please provide more context or clarify your question?

It appears that you have inputted a series of letters: "a", "a", "b", "a", and "c". Based on this input, it is unclear what question you may have. Could you please provide more context or specify your query so that I can assist you accordingly?