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.*;

public class App {
	public static void main(String[] args) {
		Scanner sc =  new Scanner(System.in);
		int n=sc.nextInt();
		n+=1;
		while(isDistinct(n)==false) {
			n++;
		}
		System.out.println(n);
		sc.close();
	}

	private static boolean isDistinct(int n) {
		int k=n;
		Set<Integer> hs=new HashSet<>();
		while(k!=0) {
			hs.add(k%10);
			k/=10;
		}
		return hs.size()==(n+"").length();
	}
	
}