from math import gcd
from collections import Counter

S=input()
C=Counter(S)

ANS=0

for i in range(10):
    for j in range(i+1,10):
        if C[str(i)]>0 and C[str(j)]>0:
            a=(10*j+i)-(10*i+j)
            ANS=gcd(ANS,a)

        if C[str(i)]>=2 and C[str(j)]>0:
            a=(10*j+i)-(10*i+i)
            ANS=gcd(ANS,a)

        if C[str(j)]>=2 and C[str(i)]>0:
            a=(10*j+j)-(10*j+i)
            ANS=gcd(ANS,a)

        for k in range(j+1,10):
            if C[str(i)]>0 and C[str(j)]>0 and C[str(k)]>0:
                a=(100*k+10*j+i)-(100*i+10*j+k)
                b=(100*k+10*j+i)-(100*i+10*k+j)
                c=(100*k+10*j+i)-(100*j+10*i+k)
                d=(100*k+10*j+i)-(100*j+10*k+i)
                e=(100*k+10*j+i)-(100*k+10*i+k)
                ANS=gcd(ANS,a,b,c,d,e)

                

if ANS==0:
    print(S)
else:
    print(ANS)