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 year = scan.nextInt();
		scan.close();
		boolean found = false;
		do {
			year++;
			char[] y = String.valueOf(year).toCharArray();
			
			if (y[0] != y[1] && y[0] != y[2] && y[0] != y[3] && y[1] != y[2] && y[1] != y[3] && y[2] != y[3]) {
				found = true;
			}
		} while (!found);
		System.out.println(year);
	}
}
