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 BeautifulYear {

	public static void main(String args[]) {
		
		Scanner in = new Scanner(System.in);
		int y,z;
		y = in.nextInt();
		z = y + 1;
		while(z>y)
		{
		  int a[] = new int[4];
		  a[0] = z % 10;
		  a[1] = (z/10) % 10;
		  a[2] = (z/100) % 10;
		  a[3] = z/1000;
		  if((a[0] != a[1]) && (a[0] != a[2]) && (a[0] != a[3]) && (a[1] != a[2])
				  && (a[1] != a[3]) && (a[2] != a[3]) )
			  break;
		  else
			  z++;
		}
		System.out.println(z);
		
	}
	
}
