When listing nouns belonging to a certain category,  (a) can be added to the end of each noun to give an informal feeling a bit like saying "you know, that kind of thing" after a list of things.

Structure

啊, B 啊, C 啊⋯⋯

Examples

As in the first example, the list can be followed by 什么的, but is not generally followed by  as this feels too formal.

See also

Sources and Further Reading