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.HashSet;
import java.util.Scanner;
import java.util.Set;
public class Main 
{

	
	public static void main(String[] args) 
	{
		Scanner in=new Scanner(System.in);
		while (in.hasNext()) 
		{			
			int anio=in.nextInt();
			boolean bandera=true;
			while (bandera) 
			{
				anio++;
				String s =String.valueOf(anio);
				Set<Character>set=new HashSet<Character>();
				for (int i = 0; i < s.length(); i++) 
				{
					set.add(s.charAt(i));
				}
				if (set.size()==4) 
				{
					System.out.println(anio);
					bandera=false;
				}
			}
		}
		

	}

}