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.*;
import java.util.*;

public class AA {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		//long a = sc.nextLong();
		//long b = sc.nextLong();
		
		int n = sc.nextInt();
		for (int i = n+1; i<=9100; i++) {
			if (ch(i)) {
				System.out.println(i);
				break;
			}
		}
		
		
		
	}
	
	static boolean ch(int n) {
		int a= n%10;
		n /=10;
		int b= n%10;
		n /=10;
		int c= n%10;
		n /=10;
		int d= n;
		return (a != b) && (a != c) && (a != d) && (b != c) && (b != d) && (c != d);
	}

}
