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.StringTokenizer;

public class A {
	public static void main(String[] args) throws IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		
		int n = Integer.parseInt(br.readLine());
		while(true) {
			n += 1;
			if(isDistinct(n)) {
				System.out.println(n);
				break;
			}
		}			
		br.close();
	}
	
	public static boolean isDistinct(int n) {
		String s = n + "";
		for(int i=0; i<s.length()-1; i++) {
			for(int j=i+1; j<s.length(); j++) {
				if(s.charAt(i) == s.charAt(j)) return false;
			}
		}
		return true;
	}
}
