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 Codeforces {
      static boolean check(int s){
    String v= Integer.toString(s);
          for (int i = 0; i < 4; i++) {
              for (int j = i+1; j < 4; j++) {
                  if (v.charAt(i)==v.charAt(j)) {
                        
                     return true;
                
                  }
              }
          }
          return false;
    }
    public static void main(String[] args) {
         Scanner in = new Scanner(System.in);
    int s=in.nextInt();
 
        do {
           s+=1;
       
        } while (check(s));
        
        System.out.println(s);
    }}