a = [int(i) for i in input().split()]
res = 0
for i in range(1, max(a)+1):
    b = [e % i for e in a]
    if len(b) != len(set(b)):
        continue
    if b[1] == max(b) or b[1] == min(b):
        res += 1
b = [e % (max(a)+1) for e in a]
if len(b) == len(set(b)) and (b[1] == max(b) or b[1] == min(b)):
    print("INF")
else:
    print(res)