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.io.PrintStream;
import java.util.HashSet;
import java.util.Scanner;

public class Div2 {

    public static void main(String[] args){
        PrintStream p = System.out;
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        for(int i=n+1;i<=15000;i++) {
            boolean c = solve(i);
            if(c){
                p.print(i);
                break;
            }
        }
    }

    private static boolean solve(int i) {
        HashSet j = new HashSet();
        while(i>0){
            int t = i%10;
            j.add(t);
            i /= 10;
        }
        if(j.size() == 4)
            return true;
        else
            return false;
    }
}
