from math import gcd

s = input()

arr = [0] * 10

for c in s:
    arr[ord(c) - ord('0')] += 1

g = 0

for a in range(10):
    if arr[a] == 0:
        continue
    for b in range(a):
        if arr[b] == 0:
            continue

        g = gcd(g, 9 * (a - b))

ans = gcd(g, int(s))

print(ans)