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;
//271A

public class BeautifulYear {

	public static void main(String[] args) {
		Scanner s = new Scanner(System.in);
		int Cyear=s.nextInt()+1;
		boolean wht=true;
		while(wht){
			int n= Cyear;
			String copy=Integer.toString(n);
			if(check(copy))
			Cyear++;	
			
			else
				wht=false;
		}
		System.out.println(Cyear);
		s.close();
	}
public static boolean check(String str){
	for(int i=0;i<3;i++){
		for(int j=i+1;j<4;j++){
			if(str.charAt(i)==str.charAt(j))
				return true;
		}
	}
	return false;
}
}
