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.lang.Math;
import java.util.Scanner;
public class hello {
	public static void main(String[] args) {
		Scanner sc=new Scanner(System.in);

		String s = sc.nextLine();

		int j = Integer.parseInt(s);

		while(true){
			j++;
			if(Integer.toString(j).chars().distinct().count()==4){
				System.out.println(j);
				break;
			}
		}


		sc.close();
		
	}
}