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.*;
public class Main {
	public static void main(String[] args) {
		Scanner scanner=new Scanner(System.in);
		int A=scanner.nextInt();
		int B=scanner.nextInt();
		String s=scanner.next();
		int i=0;
		for (i = 0; i < A+B+1; i++) {
			char c=s.charAt(i);
			if (c>=48&&c<=57&&i!=A) {
				continue;
			}else if(i==A&&c=='-'){
				continue;
			}else {
				break;
			}
		}
		if (i!=A+B+1) {
			System.out.println("No");
		}else {
			System.out.println("Yes");
		}
	}
}