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.
The single line contains integer *y* (1000 ≤ *y* ≤ 9000) — the year number.
import java.util.*;

public class Main{
    public static void main(String[] args) {
        Scanner sc=new Scanner(System.in);
        int y=sc.nextInt();
        int ny=y+1;
        while(!hasDistinctDigits(ny)) {
            ny++;
        }
        System.out.println(ny);
    }
    private static boolean hasDistinctDigits(int n) {
        HashSet<Integer>set=new HashSet<>();
        while(n>0){
            int digit=n % 10;
            if (set.contains(digit)) {
                return false;
            }
            set.add(digit);
            n /= 10;
        }
        return true;
    }
}