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;
/**
 * Matt's solution to A. Beautiful Year
 * 
 * @author Matthew
 * @version 1
 */

public class BeautifulYear
{
	public static void main(String[] args) 
	{
		Scanner reader = new Scanner(System.in); 
		int n = reader.nextInt(); //starting number
		int currentYear = n;
		boolean parsed = false;
		boolean matchFound = false;
		while(!parsed)
		{
			currentYear++;
			//System.out.println("evaluating year " + currentYear);
			String s = String.valueOf(currentYear);
			for(int i = 0; i < s.length(); i++)
			{
				//System.out.println("looping through number " + s.charAt(i));
				for(int j = 0; j < s.length(); j++)
				{
					//System.out.println("Comparing against number " + s.charAt(j));
					if(i != j && s.charAt(i) == s.charAt(j))
					{
						//System.out.println("Match found. Terminating...");
						matchFound = true;
						break;
					}
				}
				if(matchFound)
					break;
			}
			if(!matchFound)
				parsed = true;
			matchFound = false;
		}
		
		System.out.println(currentYear);
		reader.close();
	}
}