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.*;
public class Beautiful_Year {
	static Scanner sc = new Scanner(System.in);
	public static void main(String[] args) {
		Integer year = sc.nextInt()+1;
		Map<String, Integer> map = new HashMap<String, Integer>();
		for (;;) {
			String str = year.toString();
			for (int i=0; i<str.length(); i++) {
				map.put(str.substring(i, i+1), 0);
			}
			if (map.size()==4) {
				break;
			}
			else {
				map.clear();
				year++;
			}
		}
		System.out.println(year);
	}
}