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.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Arrays;
import java.util.HashSet;
import java.util.Set;

public class Task {
    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        int y = Integer.parseInt(br.readLine());

        while(y <= 10000) {
            y++;
            int temp = y;
            Set<Integer> s = new HashSet<>();
            for(int i = 0; i < 4; i++) {
                s.add(temp % 10);
                temp = (temp - temp % 10)/10;
            }
            if(s.size() == 4)
                break;
        }
        System.out.println(y);
    }
}