>
> (case 8
>   ((8 9 10) 'hello)
>   (else 'goodbye)) -> hello
>
> (case "8"
>   (("8" "9" "10") 'hello)
>   (else 'goodbye)) -> goodbye

case uses eqv? for its comparisons.  Two strings are eqv? only if they are
the same object, not if they have the same contents.  See the Racket help
desk for more.
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