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;

//Jan 12 2014

public class p271A {

	public static void main(String[] args) {
		Scanner in = new Scanner(System.in);
		int num=in.nextInt();
		int i = 0;
		for(i = num+1;i<=(int)1e10;i++){
			num = i;
			int a = num%10;
			num = num/10;
			int b = num%10;
			num = num/10;
			int c = num%10;
			num = num/10;
			int d = num%10;
			num = num/10;
		//System.out.print(a);
		//	System.out.print(b);
			//System.out.print(c);
			//System.out.print(d);
			//System.out.println("\n");
			if(a != b && b!= c && c!= d && a!= c &&a!=d && b!=d)
				break;
			
		}
		System.out.println(i);
	}

}
