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;

public class MyClass{
    public static void main(String [] args){
        Scanner sc = new Scanner(System.in);
        int yr = sc.nextInt();
        int c;
        int n[] = new int[4];
        if(yr>999 && yr<9001){
            for(int i=yr+1;i<9012;i++){
                c=0;
                n[0]=i%10;
                n[1]=(i/10)%10;
                n[2]=(i/100)%10;
                n[3]=(i/1000)%10;
                for(int j=0;j<3;j++){
                    for(int k=j+1;k<4;k++){
                        if(n[j]==n[k]){
                            c++;
                            break;
                        }
                    }
                    if(c==1){
                        break;
                    }
                }
                if(c==0){
                    System.out.println(i);
                    return;
                }
            }
            System.out.println(9012);
        }
    }

}