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.lang.*;
import java.util.*;
public class BeautifulYear{
    public static void main(String args[]){
        Scanner sc = new Scanner(System.in);
        int input = sc.nextInt();
        boolean dist = false;
        int i = input + 1;
        while(true){
            dist = checkIfDistinct(i);
            if(dist)
                {
                    System.out.println(i);
                    break;
                }
                i=i+1;
        }
    }
    
    public static boolean checkIfDistinct(int year){
        String yr = String.valueOf(year);
        boolean result = false;
        Set<Character> set = new HashSet<Character>();      
        for(int i = 0; i < 4;i++){
            set.add(yr.charAt(i));
        }
        if(set.size() == 4)
            result = true;
        set.clear();
        return result;
    }
}