#include<bits/stdc++.h>
//#define int long long
using namespace std;
inline int read()
{
   int x=0,f=1;char ch=getchar();
   while (ch<'0'||ch>'9'){if (ch=='-') f=-1;ch=getchar();}
   while (ch>='0'&&ch<='9'){x=(x<<3)+(x<<1)+ch-48;ch=getchar();}
   return x*f;
}
void write(int x)
{
   if(x<0)putchar('-'),x=-x;
   if(x<10)putchar(x+'0');
   else write(x/10),putchar(x%10+'0');
}
const int N=5e5;
const int mod=1e9+7;
long long n;
int top;
int sum[N];
int ans;
bool fl[N];
void dfs(int u,int sm){
	if(u==top+1){
		if(!ans)ans=sm;
		else ans=__gcd(ans,sm);
		return;
	}
	for(int i=1;i<=top;i++){
		if(fl[i])continue;
		fl[i]=1;
		dfs(u+1,sm*10+sum[i]);
		fl[i]=0; 
	}
}
signed main(){
//	freopen("gcd.in","r",stdin);
//	freopen("gcd.out","w",stdout);
	cin>>n;
	while(n){
		sum[++top]=n%10;
		n/=10;
	}
	dfs(1,0);
	cout<<ans<<"\n";
	return 0;
}