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 _271A
{
	public static void main(String args[])
	{
		Scanner sc = new Scanner(System.in);
		int
		n = sc.nextInt();
		_271A a = new _271A();
		while(true)
		{
			n++;
			if(a.distinct(n))
				break;
		}
		System.out.println(n);
	}

	public boolean distinct(int n)
	{
		int i,f,j;
		f = 0;
		char ch;
		String s = Integer.toString(n);
		for(i = 0; i < 4; i++)
		{
			ch = s.charAt(i);
			for(j = i+1 ; j < 4; j++)
			{
				if(ch==s.charAt(j))
				{
					f = 1;
					break;
				}
			}
		}
		if(f==1)
			return false;
		else 
			return true;
	}
}