(def! fib (fn* (n) (cond (= 0 n) 0
                         (= 1 n) 1
                         true    (+ (fib (- n 1)) (fib (- n 2))))))
(def! main (fn* ()
    (do
        (let* (n 27)
            (println "Fib(" n "): " (fib n)))
        0)))