(define a (read))
(define b (read))
(define c (read))

(define isKadomatsu?
  (lambda (a b c)
    (cond
      ((and
        (and (not (= a b))
             (not (= b c))
             (not (= a c)))
        (or
         (and (< a b) (> b c))
         (and (> a b) (< b c))))
       #t)
      (#t #f)
      )))


(define solve
  (lambda (a b c i count)
    (cond
      ((<= i (max a b c))
       (cond
         ((isKadomatsu? (remainder a i) (remainder b i) (remainder c i))
          (if (= i (max a b c))
              (display (+ count 1))
              (solve a b c (+ i 1) (+ count 1))
              ))
         ((= i (max a b c))
          (display count))
         (#t (solve a b c (+ i 1) count))))
      )))

(define main
  (lambda (a b c)
    (cond
      ((isKadomatsu? a b c)
       (display "INF"))
      (#t (solve a b c 1 0))
      )))

(main a b c)
(newline)