#include <iostream>
#include <vector>
#include <map>
#include <set>
#include <queue>
#include <algorithm>
#include <iomanip>
#include <cassert>
using namespace std;

#define GET_ARG(a,b,c,F,...) F
#define REP3(i,s,e) for (i = s; i <= e; i++)
#define REP2(i,n) REP3 (i,0,(int)(n)-1)
#define REP(...) GET_ARG (__VA_ARGS__,REP3,REP2) (__VA_ARGS__)
#define RREP3(i,s,e) for (i = s; i >= e; i--)
#define RREP2(i,n) RREP3 (i,(int)(n)-1,0)
#define RREP(...) GET_ARG (__VA_ARGS__,RREP3,RREP2) (__VA_ARGS__)
#define DEBUG(x) cerr << #x ": " << x << endl

bool exist[10];

int gcd(int a, int b) {
    return b == 0 ? a : gcd(b,a%b);
}

int main(void) {
    string s;
    cin >> s;
    int i, j;
    REP (i,s.size()) exist[s[i]-'0'] = true;
    int g = 0;
    REP (i,10) REP (j,10) if (i != j && exist[i] && exist[j]) {
        if (g == 0)
            g = abs(i*9-j*9);
        else
            g = gcd(g,abs(i*9-j*9));
    }
    if (g == 0)
        cout << s << endl;
    else {
        int rest = 0;
        REP (i,s.size()) {
            rest = rest * 10 + s[i] - '0';
            rest %= g;
        }
        cout << gcd(g,rest) << endl;
    }
    return 0;
}