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.Scanner;


public class BeautifulYear {

	public static void main(String[] args) throws Exception{

		int [] tenPowers = {1, 10, 100, 1000};
		
		Scanner sc = new Scanner(System.in);
		
		while (sc.hasNextInt()) {
			int year = sc.nextInt();
			
			int r = year;
			
			outer:
			for (int i = year + 1; r == year; i++) {
				boolean[] dig = new boolean[10];
				int d;
				int y = i;
				
				for (int j = 3; j >= 0; j--) {
					d = y / tenPowers[j];
					dig[d] = !dig[d];
					
					if (!dig[d])
						continue outer;
					
					y %= tenPowers[j];					
				}
				
				r = i;
			}
			
			System.out.println(r);
		}
	}

}
