(define (iskadomatz? a b c)
    (and (not (= a c)) (or (and (< a b) (> b c)) (and (> a b) (< b c))))
)

; 2時間ぐらいググったけれど展開方法が分からなかったので気合
(define (iskadomatz2? arr a b)
    (iskadomatz? a b (car arr))
)
(define (iskadomatz1? arr a)
    (iskadomatz2? (cdr arr) a (car arr))
)
(define (iskadomatz-list? arr)
    (iskadomatz1? (cdr arr) (car arr))
)


(define (replace arr from to)
    (map (lambda (e) (if (equal? e from) to e)) arr)
)

(let
    (
         (bamboo (list (read) (read) (read)))
    )
    (if (iskadomatz-list? (replace bamboo '? 1)) (write 1) #f)
    (if (iskadomatz-list? (replace bamboo '? 4)) (write 4) #f)
)