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.io.*;
import java.util.*;
public class set2o2 {

	
	
	public static void main(String[] args) throws IOException  {
		
		Scanner sc = new Scanner(System.in);
		int y = sc.nextInt();
		int r=y+1;
		
		while(true) {
			String s=""+r;
			boolean flag=true;
			for (int i=0;i<3 && flag;i++) {
				int j=i+1;
				for(;j<4 && flag;j++) {
					if(s.charAt(i)==s.charAt(j)) 
						flag = false;
				}
			}
			if(flag) {
				System.out.println(r);
				break;
			}
			r++;
		}
	}
}
