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.HashSet;
import java.util.Scanner;

public class BeautifulYear {

	public static void main(String[] args) {
		Scanner scan= new Scanner(System.in);
		int y=scan.nextInt();
		HashSet<Integer> h= new HashSet<Integer>();
		for(int i=y+1;i<9999;i++)
		{
			int c=i;
			while(c!=0)
			{
				int d=c%10;
				h.add(d);
				c/=10;
			}
		if(h.size()==4)
		{
			String s= String.valueOf(i);
			System.out.println(s);
			break;
		}
		else h.clear();
		}

	}

}
