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.io.*;
import java.util.*;
import java.text.*;
import java.math.*;
import java.util.regex.*;
public class Main{
    static boolean beautifulyear(int num){
        int c[]=new int[10];
        for (int j=0;j<=9;j++){
            c[j]=0;
        }
        while(num!=0){
            c[num%10]++;
            num/=10;
        }
        for(int j=0;j<=9;j++){
            if(c[j]>1){
                return false;
            }
        }
        return true;
    }
	public static void main(String[] args) throws IOException{
       	Scanner sc=new Scanner(System.in);
		int n=sc.nextInt();
		for(int i=n+1;;i++){
		    if(beautifulyear(i)){
		        System.out.println(i);
		        break;
		    }
		}
    }
}
