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;

public class Solution {

	public static void main(String[] argh) {

		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		sc.close();
		for (int i = n + 1; i <= 9876; i++) {
			
			String str = Integer.toString(i);	
			HashSet<Character>set=new HashSet<>();
			for(int j=0;j<str.length();j++)
			{
				set.add(str.charAt(j));
			
			}
			if(set.size()==4)
			{
				System.out.println(i);
				break;
			}
		}
		
	}
}