s = input()
if all(s[0]==si for si in s):
    print(s)
    exit()

r = [0]*10
for i in s:
    r[int(i)] = 1

c = 0
from math import gcd
for i in range(10):
    for j in range(i+1,10):
        if r[i] == r[j] == 1:
            c = gcd(c,j-i)

print(gcd(int(s),c*9))