import sys
read = sys.stdin.buffer.read
readline = sys.stdin.buffer.readline
readlines = sys.stdin.buffer.readlines

from functools import reduce
from fractions import gcd

Nstr = [int(x) - ord('0') for x in read().rstrip()]

nums = sorted(set(Nstr))

if len(nums) == 1:
    print(''.join(map(str,Nstr)))
    exit()

diff = [y - x for x,y in zip(nums,nums[1:])]

d = reduce(gcd,diff)

d *= 9
N = int(''.join(map(str,Nstr)))
answer = gcd(N,d)
print(answer)