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.*;

//https://codeforces.com/problemset/problem/271/A

public class Main {
    public static void main(String[] args) {

        Scanner sc = new Scanner(System.in) ;

        int year = sc.nextInt() ;

        distinctYear(year);

    }

    public static void  distinctYear(int year){
        year +=1 ;
        boolean distinct = false ;
        String yr = Integer.toString(year) ;

        while (distinct==false){
            HashSet<Character> set = new HashSet<>() ;

            for(int i=0 ; i<4;  i++){
                char c = yr.charAt(i)  ;
                set.add(c) ;
            }

            if ( set.size()==4 ){
               distinct = true  ;
            }else {
                year++ ;
                yr = Integer.toString(year) ;
            }

        }

        System.out.println(year) ;



    }




}
