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 BeautifulYear {
	public static boolean test(int year) {
		int[] ar = new int[4];
		for(int i=0; i< 4; i++) {
			ar[i] = Integer.toString(year).charAt(i);
			
		}
		Arrays.sort(ar);
		for(int i=0; i<ar.length; i++) {
			if(i!=0&& ar[i]==ar[i-1]) {
				return false;
			}
			
		}
		return true;
	}

	public static void main(String[] args) throws IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		PrintWriter pw = new PrintWriter(System.out);
		int year = Integer.parseInt(br.readLine());
		int i = 1;
		while(true) {
			if(test(year+i)){
				pw.println(year+i);
				break;
			}
			i++;
		}
		br.close();
		pw.close();

	}

}