const COMPOUNDS: [(&str, Rule); 18] = [
    ("#()", Rule::vector),
    ("#(hello)", Rule::vector),
    ("()", Rule::list),
    ("( )", Rule::list),
    ("(hello)", Rule::list),
    ("(+ 1 2)", Rule::list),
    ("(+ #(1 2 3) #(4 5 6))", Rule::list),
    ("(define test (a b) (+ a b))", Rule::list),
    ("(1 . 2)", Rule::list),
    ("(1 2 . 3)", Rule::list),
    ("(8 . (13 . ( ) ) )", Rule::list),
    ("(1 2 3 . 4)", Rule::list),
    ("(1 2 3 . (4 . ()))", Rule::list),
    ("(1 2 3 . (4 . (5 . ())))", Rule::list),
    ("'(1 2 3)", Rule::abbrev),
    ("`(1 2 3)", Rule::abbrev),
    (",(1 2 3)", Rule::abbrev),
    (",@(1 2 3)", Rule::abbrev),
];