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 BeautifulYear_271A {
	public static boolean distinctDigits(int y) {
		int arr[] = new int[4];
		
		for(int i = 0 ;i<4; i++) {
			arr[i] = y%10;
			y = y/10;
		}
		Arrays.sort(arr);
		boolean check = false;
		for(int i = 1; i<4; i++) {
			if(arr[i]==arr[i-1]) {
				check = true;
				break;
			}
		}
		return check;
	}

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner sc = new Scanner(System.in);
		int y = sc.nextInt();
		y++;
		while(true){
			if(distinctDigits(y)==false) {
				System.out.println(y);
				break;
			}
			else {
				y++;
			}
		}

	}

}