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;

/**
 * Created by akshaysharma on 28/01/17.
 */
public class Problem271A {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        N++;
        while (true) {
            if (isUnique(N)) {
                System.out.print(N);
                break;
            }
            N++;
        }

    }

    public static boolean isUnique(int N) {
        int[] arr = new int[10];
        while (N > 0) {
            int r = N % 10;
            N = N / 10;
            arr[r]++;
            if (arr[r] > 1) {
                return false;
            }
        }
        return true;
    }
}
