> OUTPUT: a tuple ``(a,b)`` with 
>
> - ``a`` a foo 
>
> - ``b`` a bar 
>

How about this? We can avoid making up variables.

---- (1)

OUTPUT: tuple of

- foo; friend of bar

- bar; friend of foo
----
or simply
---- (2)
OUTPUT:

- foo; friend of bar

- bar; friend of foo
-----
 

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