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.*;
public class cat{
static String sort(int n)
{
	String s=n+"";
	char a,b;
	StringBuilder sb=new StringBuilder(s);
	for (int i=0; i<4; i++)
		for (int i1=i+1;i1<4; i1++)
		{
			a=sb.charAt(i);
			b=sb.charAt(i1);
			if (a>b) 
			{
				sb.setCharAt(i,b);
				sb.setCharAt(i1,a);
			}
		}
	s=sb.toString();
	return s;
}
static int elem(String s)
{
	int n=1;
	for (int i=0; i<3; i++)
		if (s.charAt(i)!=s.charAt(i+1)) n++;
	return(n);
}
public static void main(String[] args)
{
	Scanner in=new Scanner(System.in);
int n=in.nextInt(),i=n+1;
while (elem(sort(i))!=4)
{
	i++;
}
System.out.print(i);
  }
}