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.*;

public class BeautifulYear {
  public static void main(String args[]) {
    Scanner scan = new Scanner(System.in);
    int n = scan.nextInt();
    for (int i = n+1; i <= 9012; i++)
      if (isDistinct(i)) {
        System.out.println(i);
        break;
      }
    scan.close();
  }

  static boolean isDistinct(int n) {
    HashSet<Integer> hs = new HashSet<>();
    while (n > 0) {
      hs.add(n%10);
      n /= 10;
    }
    return hs.size() == 4;
  }
}