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 Solution {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        
        int year = sc.nextInt();
        
        for(int i = year + 1; i<=10000; i++) {
            if(isDist(i)) {
                System.out.println(i);
                break;
            }
        }
        sc.close();
    }
    
    private static boolean isDist(int num) {
        int [] counts = new int[10];
        
        while(num > 0) {
            counts[num % 10]++;
            if(counts[num % 10] == 2) return false;
            
            num /= 10;
        }
        
        return true;
    }
}
