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.lang.*;
import java.io.*;

public class BeautifulYear271A
{
	public static void main (String[] args) throws java.lang.Exception
	{
		// Input
		Scanner sc = new Scanner(System.in);
		int d = sc.nextInt();

		while (true) {
			d++;
			if (checkDistinct(Integer.toString(d))) {
				System.out.println(d);
				return;	
			}
		}
	}

	public static Boolean checkDistinct(String d) {
		int d1 = Character.getNumericValue(d.charAt(0));
		int d2 = Character.getNumericValue(d.charAt(1));
		int d3 = Character.getNumericValue(d.charAt(2));
		int d4 = Character.getNumericValue(d.charAt(3));

		HashSet<Integer> set = new HashSet<Integer>();
		set.add(d1);
		set.add(d2);
		set.add(d3);
		set.add(d4);

		return set.size() == 4;
	}	
}