#include<bits/stdc++.h>
using namespace std;
using Int = long long;
template<typename T1,typename T2> inline void chmin(T1 &a,T2 b){if(a>b) a=b;}
template<typename T1,typename T2> inline void chmax(T1 &a,T2 b){if(a<b) a=b;}

//INSERT ABOVE HERE
signed main(){
  string s;
  cin>>s;
  {
    string t(s);
    t.erase(unique(t.begin(),t.end()),t.end());
    if(t.size()==1){
      cout<<s<<endl;
      return 0;
    }
  }
  
  if(s.size()<10){
    Int ans=stoll(s);
    sort(s.begin(),s.end());
    do{
      Int res=0;
      for(char c:s) res=res*10+(c-'0');
      ans=__gcd(ans,res);      
    }while(next_permutation(s.begin(),s.end()));
    cout<<ans<<endl;
    return 0;
  }

  vector<Int> cnt(10,0);
  for(char c:s) cnt[c-'0']++;

  Int ans=-1;
  for(Int i=0;i<10;i++){
    for(Int j=0;j<10;j++){
      if(!cnt[i]||!cnt[j]) continue;
      Int k=abs(i-j)*9;
      if(ans<0) ans=k;
      ans=__gcd(ans,k);
    }
  }

  Int res=0;
  for(char c:s){
    res=res*10+(c-'0');
    res%=ans;
  }

  cout<<__gcd(res,ans)<<endl;
  
  return 0;
}