#include "bits/stdc++.h"
using namespace std;
#define FOR(i,j,k) for(int (i)=(j);(i)<(int)(k);++(i))
#define rep(i,j) FOR(i,0,j)
#define each(x,y) for(auto &(x):(y))
#define mp make_pair
#define all(x) (x).begin(),(x).end()
#define debug(x) cout<<#x<<": "<<(x)<<endl
#define smax(x,y) (x)=max((x),(y))
#define smin(x,y) (x)=min((x),(y))
#define MEM(x,y) memset((x),(y),sizeof (x))
#define sz(x) (int)(x).size()
typedef long long ll;
typedef pair<int, int> pii;
typedef vector<int> vi;
typedef vector<ll> vll;

int gcd(int a, int b){
    return b?gcd(b, a%b):a;
}

vector<int> divisors(int n){
    vector<int> res;
    for(int i=1; (long long)i*i<=n; ++i){
        if(n%i==0){
            res.push_back(i);
            int j = n/i;
            if(j!=i)res.push_back(j);
        }
    }
    return res;
}

int main(){
    ios::sync_with_stdio(false);
    cin.tie(0);
    string s;
    while(cin >> s) {
        set<int> t;
        each(c, s)t.insert(c - '0');
        if(sz(t) == 1) {
            cout << s << endl;
            continue;
        }
        each(c, s)c -= '0';
        int g = 0;
        each(a, t)each(b, t) {
            g = gcd(g, 9*abs(a-b));
        }

        auto divs = divisors(g);
        sort(divs.rbegin(), divs.rend());
        each(d, divs) {
            ll x = 0;
            each(c, s) {
                x = (x * 10 + c) % d;
            }
            if(x == 0) {
                cout << d << endl;
                break;
            }
        }
    }
}