Interrupt!
1>
> (assoc 'a '((1 2)(a b)(3 4)))
eval: unbound variable: assoc
1>
> (assq 'a '((1 2)(a b)(3 4)))
(a b)
> (assv 'a '((1 2)(a b)(3 4)))
(a b)
> (assc 'a '((1 2)(a b)(3 4)))
eval: unbound variable: assc
1>
> (assoc 'a '((1 2)(a b)(3 4)))
(a b)
>  (assoc 'a '((1 2)(a b)(3 4)))
(a b)
>

