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.Scanner;

public class p271A {

	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);
		int in = scan.nextInt();
		in++;
		while (true) {
			String a = Integer.toString(in);
			if (a.charAt(0) != a.charAt(1) && a.charAt(1) != a.charAt(2) && a.charAt(2) != a.charAt(3)
					&& a.charAt(0) != a.charAt(2) && a.charAt(0) != a.charAt(3) && a.charAt(1) != a.charAt(3)) {
				System.out.println(in);
				return;
			}
			in++;
		}
	}

}
