The postal code in Atcoder Kingdom is A+B+1 characters long, its (A+1)-th character is a hyphen `-`, and the other characters are digits from `0` through `9`.

You are given a string S. Determine whether it follows the postal code format in Atcoder Kingdom.

Constraints

* 1≤A,B≤5
* |S|=A+B+1
* S consists of `-` and digits from `0` through `9`.

Input

Input is given from Standard Input in the following format:


A B
S


Output

Print `Yes` if S follows the postal code format in AtCoder Kingdom; print `No` otherwise.

Examples

Input

3 4
269-6650


Output

Yes


Input

1 1
---


Output

No


Input

1 2
7444


Output

No
import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int a=sc.nextInt(),b=sc.nextInt();
		String s=sc.next();
		int cnt=0;
		for(int i=0;i<(a+b+1);i++) {
			if(i==a) {
				if(s.charAt(i)=='-') {
					cnt++;
				}
			}else {
				if(s.substring(i,i+1).matches("[0-9]")) {
					cnt++;
				}
			}
		}
		System.out.println(cnt==s.length()?"Yes":"No");
	}
}