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

/**
 *
 * @author Yesha Shah
 */

import java.util.Scanner; 
import java.util.Arrays;

public class TheatreClass {
    public static void main(String[] args) {
        
        Scanner sc = new Scanner(System.in);
        
        String str, str2;
        int curr_yr = sc.nextInt();
        int ans = curr_yr + 1;
        boolean found = false;
        while(true) {
            str = String.valueOf(ans);
            str2 = "";
            for(int i=0; i<4; i++) {
                if(str2.contains(str.substring(i,i+1)))
                    break;
                else str2+=str.substring(i,i+1);
            }
            if(str2.length() == 4) break;
            ans++;
        }
        
        System.out.println(ans);
    }
    
}
