It seems like the year of 2013 came only yesterday. Do you know a curious fact? The year of 2013 is the first year after the old 1987 with only distinct digits.

Now you are suggested to solve the following problem: given a year number, find the minimum year number which is strictly larger than the given one and has only distinct digits.

Input

The single line contains integer y (1000 ≤ y ≤ 9000) — the year number.

Output

Print a single integer — the minimum year number that is strictly larger than y and all it's digits are distinct. It is guaranteed that the answer exists.

Examples

Input

1987


Output

2013


Input

2013


Output

2014
import java.util.Scanner;
public class year
{
static int check(int x)
{
String s = String.valueOf(x);
int l = s.length();int k=0;
for(int i=0;i<l;i++)
{
for(int j=i+1;j<l;j++)
{
if(s.charAt(i)==s.charAt(j))
{
k++;
break;
}
}
}
return k;
}
public static void main(String[] args)
{
Scanner kb = new Scanner(System.in);
int n = kb.nextInt();
for(int i=n+1;;i++)
{
if(check(i)==0)
{
System.out.println(i);
break;
}
}
}
}