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.HashSet;
import java.util.Scanner;
import java.util.Set;

public class _271A {
    static boolean check(int a){
        Set s = new HashSet<>();
        while(a!=0){
            s.add(a%10);
            a/=10;
        }
        return s.size() == 4;
    }

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int a = in.nextInt();
        a++;
        while(check(a)==false){
            a++;
        }
        System.out.print(a);

    }
}
