#pragma GCC target("avx2")
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")

#include <algorithm>
// #include <atcoder/all>
#include <bitset>
#include <cassert>
#include <cmath>
#include <ctime>
#include <functional>
#include <iomanip>
#include <iostream>
#include <map>
#include <queue>
#include <random>
#include <set>
#include <stack>
#include <string>
#include <tuple>
#include <unordered_map>
#include <unordered_set>
#include <utility>
#include <vector>
using namespace std;
// using namespace atcoder;
typedef long long ll;
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define repr(i, n) for (int i = (int)(n) - 1; i >= 0; i--)
#define repk(i, k, n) for (int i = k; i < (int)(n); i++)
#define all(v) v.begin(), v.end()
#define mod1 1000000007
#define mod2 998244353
#define mod3 100000007
#define vi vector<int>
#define vs vector<string>
#define vc vector<char>
#define vl vector<ll>
#define vb vector<bool>
#define vvi vector<vector<int>>
#define vvc vector<vector<char>>
#define vvl vector<vector<ll>>
#define vvb vector<vector<bool>>
#define vvvi vector<vector<vector<int>>>
#define vvvl vector<vector<vector<ll>>>
#define pii pair<int, int>
#define pil pair<int, ll>
#define pli pair<ll, int>
#define pll pair<ll, ll>
#define vpii vector<pair<int, int>>
#define vpll vector<pair<ll, ll>>
#define vvpii vector<vector<pair<int, int>>>
#define vvpll vector<vector<pair<ll, ll>>>

// using mint = modint998244353;

template <typename T>
void debug(T e) {
    cerr << e << endl;
}

template <typename T>
void debug(vector<T> &v) {
    rep(i, v.size()) { cerr << v[i] << " "; }
    cerr << endl;
}

template <typename T>
void debug(vector<vector<T>> &v) {
    rep(i, v.size()) {
        rep(j, v[i].size()) { cerr << v[i][j] << " "; }
        cerr << endl;
    }
}

template <typename T>
void debug(vector<pair<T, T>> &v) {
    rep(i, v.size()) { cerr << v[i].first << " " << v[i].second << endl; }
}

template <typename T>
void debug(set<T> &st) {
    for (auto itr = st.begin(); itr != st.end(); itr++) {
        cerr << *itr << " ";
    }
    cerr << endl;
}

template <typename T>
void debug(multiset<T> &ms) {
    for (auto itr = ms.begin(); itr != ms.end(); itr++) {
        cerr << *itr << " ";
    }
    cerr << endl;
}

template <typename T>
void debug(map<T, T> &mp) {
    for (auto itr = mp.begin(); itr != mp.end(); itr++) {
        cerr << itr->first << " " << itr->second << endl;
    }
}

void debug_out() { cerr << endl; }

template <typename Head, typename... Tail>
void debug_out(Head H, Tail... T) {
    cerr << H << " ";
    debug_out(T...);
}

ll my_gcd(ll a, ll b) {
    ll ret = 0;
    if (a < b) {
        swap(a, b);
    }
    if (b == 0) {
        ret = a;
    } else {
        ret = my_gcd(b, a % b);
    }
    return ret;
}

int main() {
    string N;
    cin >> N;
    ll M = N.size();
    vector<ll> cnt(10, 0);
    for (ll i = 0; i < M; i++) {
        cnt[(ll)(N[i] - '0')]++;
    }
    bool all_same = true;
    for (ll i = 0; i < M; i++) {
        if (N[i] != N[0]) {
            all_same = false;
        }
    }
    if (all_same) {
        cout << N << endl;
    } else {
        ll g = -1;
        for (ll i = 0; i < 10; i++) {
            for (ll j = i + 1; j < 10; j++) {
                if (cnt[i] > 0 && cnt[j] > 0) {
                    ll q = 9 * (j - i);
                    if (g == -1) {
                        g = q;
                    } else {
                        g = my_gcd(g, q);
                    }
                }
            }
        }
        // debug(g);
        ll ans = 1;
        for (ll i = 1; i <= g; i++) {
            if (g % i == 0) {
                ll now_rem = 0;
                for (ll j = 0; j < M; j++) {
                    now_rem = (now_rem * 10 + (ll)(N[j] - '0')) % i;
                }
                if (now_rem == 0) {
                    ans = max(ans, i);
                }
            }
        }
        cout << ans << endl;
    }
}