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 Date {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner scan = new Scanner(System.in);
		int x = scan.nextInt();
		x++;
		while(!year(x + "")) x++;
		System.out.println(x);
	}
	public static boolean year(String s) {
		for(int i = 0; i < s.length(); i++) {
			for(int j = 0; j < s.length(); j++) {
				if(i != j && s.charAt(i) == s.charAt(j)) return false;
			}
		}
		return true;
	}

}
