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.Arrays;
import java.util.Scanner;
public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n;
        while(sc.hasNext()){
            n = sc.nextInt();
            System.out.println(findDistinctDigits(n));
        }
    }
    public static int findDistinctDigits(int preDigit){
        int maxnumber = 10000;
        for (int i = preDigit + 1; i < maxnumber; i++) {
            if(judge(i)){
                return i;
            }
        }
        return -1;
    }
    public static boolean judge(int givinDigits){
        int[] digit = new int[4];
        for (int i = 0; i < 4; i++) {
            digit[i] = givinDigits % 10;
            givinDigits /= 10;
        }
        Arrays.sort(digit);
        if(digit[0] == digit[1] || digit[1] == digit[2] || digit[2] == digit[3]){
            return  false;
        }
        return true;
    }

}
