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.*;
import java.io.*;
public class z{
    public static void main(String[]A)
    {
        Scanner s=new Scanner(System.in);
        
        int  a=s.nextInt();
        int t=1;
        
        while(t>0)
        {
            a=a+1;
            if(distinct(a))
            {
                break;
            }
        }
        
        System.out.print(a);

    }
    public static boolean distinct(int k)
    {
        String s = String.valueOf(k);
        int  [] a = new int[256];
        a[s.charAt(0)]++;
        a[s.charAt(1)]++;
        a[s.charAt(2)]++;
        a[s.charAt(3)]++;
        
        for(int i=0;i<256;i++)
        {
            if(a[i]>=2)
            {
                return false;
            }
        }
        return true;
    }
    
}