is_kadomatsu = lambda x: (max(x) == x[1] or min(x) == x[1]) and not is_zero(x)
is_zero = lambda x: x[0] == x[-1]

an = list(map(int, input().split()))
if is_zero(an):
    print(0)
elif is_kadomatsu(an):
    print('INF')
else:
    cnt = 0
    for b in [list(map(lambda y: y % i, an)) for i in range(2, max(an) + 1)]:
        # print(b)

        if is_kadomatsu(b):
            cnt += 1
    print(cnt)