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 test{
    public static void main(String[] args){
        Scanner in=new Scanner(System.in);
        int n=in.nextInt();

        for(int i=n+1;;i++)
        {
            int x=i;
            int[] d=new int[4];
            for(int j=0;j<4;j++)
            {
                d[j]=x%10;
                x/=10;
            }
            if(check(d)) 
                {
                    System.out.print(i);
                    break;
                } 
        }

    }

    public static boolean check(int[] a)
    {
        int[] an = new int[10];
        for(int i=0 ; i<4 ; ++i)
            an[a[i]]= 1;
        int ans = 0;
        for(int i=0;i<10;++i)
            ans += an[i];
        if(ans == 4)
            return true;
        else
            return false;
    }
}