#define _USE_MATH_DEFINES
#include <cstdio>
#include <iostream>
#include <sstream>
#include <fstream>
#include <iomanip>
#include <algorithm>
#include <cmath>
#include <complex>
#include <string>
#include <vector>
#include <list>
#include <queue>
#include <stack>
#include <set>
#include <map>
#include <bitset>
#include <numeric>
#include <limits>
#include <climits>
#include <cfloat>
#include <functional>
#include <iterator>
using namespace std;

int gcd(int a, int b){
    while(b != 0){
        int tmp = a % b;
        a = b;
        b = tmp;
    }
    return a;
}

int main()
{
    string s;
    cin >> s;
    int n = s.size();

    if(s == string(n, s[0])){
        cout << s << endl;
        return 0;
    }

    vector<bool> used(10, false);
    for(int i=0; i<n; ++i)
        used[s[i] - '0'] = true;

    int x = 9 * abs(s[0] - s[1]);
    for(int i=0; i<10; ++i){
        for(int j=0; j<i; ++j){
            if(used[i] && used[j])
                x = gcd(x, 9 * (i - j));
        }
    }

    for(int y=x; ; --y){
        if(x % y != 0)
            continue;

        int a = 0;
        for(int i=0; i<n; ++i){
            a *= 10;
            a += s[i] - '0';
            a %= y;
        }
        if(a == 0){
            cout << y << endl;
            return 0;
        }
    }
}