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 A271 {
    static class FastReader {
        BufferedReader br;
        StringTokenizer st;

        public FastReader() {
            br = new BufferedReader(new InputStreamReader(System.in));
        }

        String next() {
            while (st == null || !st.hasMoreElements()) {
                try {
                    st = new StringTokenizer(br.readLine());
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            return st.nextToken();
        }

        int nextInt() {
            return Integer.parseInt(next());
        }
    }

    public static void main(String[] args) throws java.lang.Exception {
        FastReader sc = new FastReader();
        int year = sc.nextInt();
        boolean isDistinct = true;
        Map<Integer, Integer> DistinctCheck = new HashMap<>();

        for (int nextYear = year + 1; nextYear <= 9999; nextYear++) {
            int n = nextYear;
            isDistinct = true;
            while (n > 0) {
                DistinctCheck.put(n % 10, DistinctCheck.getOrDefault(n % 10, 0) + 1);
                if (DistinctCheck.get(n % 10) > 1){
                    isDistinct = false;
                    break;
                }
                    
                n /= 10;
            }
            if (isDistinct == true) {
                System.out.println(nextYear);
                break;
            }
            DistinctCheck.clear();
        }

    }

}