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.PrintWriter;
import java.util.Scanner;


public class B {
    public static void main(String[] args) {
        Scanner in= new Scanner(System.in);
        PrintWriter out= new PrintWriter(System.out);
        
        
        int a=in.nextInt();
        
        for (int i = a+1; i < 10000; i++) {
            if(ver(i)){
            out.print(i);
            break;
            }
        }
        
        in.close();
        out.close();
    }

    private static boolean ver(int a) {
        String b=a+"";
        for (int i = 0; i < b.length(); i++) {
            if(b.substring(i+1).contains(b.charAt(i)+""))
            return false;   
        }
        return true;
    }
    
    
    
}
