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.ArrayList;
import java.util.Collections;


public class Main {
    public static void main(String args[]){
        Scanner in = new Scanner(System.in);
        int n = in.nextInt();
        n++;
        boolean flag = true;
        String a = Integer.toString(n);
        for(int i = 3;i>=0;i--){
       		for(int j=i-1;j>=0 ;j--){
       			a = Integer.toString(n);
       			if(a.charAt(i)==a.charAt(j)){
       		       // System.out.println(i+" "+j);
       				n++;
       				i=3;
       				j=3;
       		      //  System.out.println(n);
       			}
       		}
       	}
        System.out.println(n);
    }
}