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.*;
import java.io.*;

public class disyear {
	public static int conv(String s) {
		return Integer.parseInt(s);
	}

	public static void main(String[] args) throws IOException {
		//BufferedReader in = new BufferedReader(new FileReader("disyear.in"));
		//PrintWriter out = new PrintWriter(new BufferedWriter(new FileWriter("disyear.out")));
		BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
		PrintWriter out = new PrintWriter(System.out);
		int num = conv(in.readLine());
	
		for(int i=num+1; i<=10000; i++) {
			int m = i;
			
			String s = m+"";
			if(s.charAt(0)!= s.charAt(1) && s.charAt(1)!= s.charAt(2) && s.charAt(2)!= s.charAt(3) && s.charAt(0)!=s.charAt(3) && s.charAt(1)!=s.charAt(3) && s.charAt(0)!=s.charAt(2)) {
				System.out.println(s);
				break;
			}
		}
		
		in.close();
		out.close();
	}

	}

