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.io.*;
import java.util.*;
public class program
{
    public static void main(String args[])
    {
        Scanner sc=new Scanner(System.in);
        int n=sc.nextInt();
      int k=n+1;
      for(int i=n+1;i<=9012;i++)
      {
          if(f(i)==4)
           {
               System.out.println(i);
               break;
           }
      }
    }
    public static int f(int i)
    {
        HashSet<Integer> s=new HashSet<Integer>();
        while(i>0)
        {
            s.add(i%10);
            i=i/10;
        }
        return (s.size());
    }
}