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.io.*;
import java.util.*;

public class Test {

    public static void main(String[] argh) throws IOException {
//        BufferedReader pr = new BufferedReader(new InputStreamReader(System.in));
//        BufferedWriter wr = new BufferedWriter(new OutputStreamWriter(System.out));
//        String st = pr.readLine();
        Scanner in = new Scanner(System.in);
        int n = in.nextInt();
        n++;
        int count = 0;

        loop:
        while (true) {
            int[] a = new int[10];
            int m = n;
            for (int i = 0; i < 4; i++) {
                count = m % 10;
                a[count]++;
                if (a[count] > 1) {
                    n++;
                    break;
                }
                m /= 10;
            }
            boolean tr = false;
            for (int i = 0; i < 10; i++) {
                if(a[i] > 1){
                    tr = true;
                }
            }
            if(!tr){
                break loop;
            }
        }
        System.out.println(n);

    }

}