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
/* package whatever; // don't place package name! */

import java.util.*;
import java.lang.*;
import java.io.*;

/* Name of the class has to be "Main" only if the class is public. */
public class Ideone
{
	
	public static boolean isValid(int year) {
		HashSet<Integer> set = new HashSet<>();
		int n=year;
		while(n > 0) {
			int rem = n%10;
			if(set.contains(rem)) return false;
			n /= 10;
			set.add(rem);
		}
		return true;
	}
	
	public static int getNumber(int y) {
		int ans=1000;
		for(int n=y+1; n<=10000; n++) {
			if(isValid(n)) { 
				ans = n;
				break;
			}
		}
		return ans;
	}
	
	public static void main (String[] args) throws java.lang.Exception
	{
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		//String T = br.readLine();
		int t=1;
		//if(T != null) t = Integer.parseInt(T);
		while(t-- > 0) {
			String Y = br.readLine();
			int year = 1000;
			if(Y != null) year = Integer.parseInt(Y);
			System.out.println(getNumber(year));
		}
	}
}