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;
import java.util.TreeSet;

public class A271 {
	
	public static void main(String args[]){
		
		Scanner in = new Scanner(System.in);
		
		int n =in.nextInt();
		String s;
		int m=0;
		
		
		for(int i=n+1;i<9013;i++){
			s=""+i;
			TreeSet<Integer> h = new TreeSet<Integer>();
			for(int j=0;j<4;j++){
				h.add(Integer.parseInt(""+s.charAt(j)));
			}
			int n1=h.size();
			
		if(n1==4){
			m=i;
			break;
		}
		
		}
		
		System.out.println(m);
		
	}
	

}
