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.OutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.util.stream.IntStream;
import java.util.Scanner;

/**
 * Built using CHelper plug-in
 * Actual solution is at the top
 */
public class Main {
    public static void main(String[] args) {
        InputStream inputStream = System.in;
        OutputStream outputStream = System.out;
        Scanner in = new Scanner(inputStream);
        PrintWriter out = new PrintWriter(outputStream);
        ProblemABeautifulYear solver = new ProblemABeautifulYear();
        solver.solve(1, in, out);
        out.close();
    }

    static class ProblemABeautifulYear {
        public void solve(int testNumber, Scanner in, PrintWriter out) {
            String year = in.next();
            year = String.valueOf(Integer.valueOf(year) + 1);
            while (true) {
                if (year.chars().distinct().count() == 4) {
                    out.print(year);
                    return;
                }
                year = String.valueOf(Integer.valueOf(year) + 1);
            }
        }

    }
}

