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 sc = new Scanner(System.in);
		int a = sc.nextInt();
		int b = sc.nextInt();
		String str = sc.next();
		String ans="No";
		
		for(int i=0; i<a; i++){
		    if(Character.isDigit(str.charAt(i))){
		        ans = "Yes";
		    }
		}
		
		if(str.substring(a,a+1).equals("-") && ans=="Yes"){
		    ans = "Yes";
		}else{
		    ans = "No";
		}
		
		for(int i=a+1; i<a+b+1; i++){
		    if(Character.isDigit(str.charAt(i)) && ans=="Yes"){
		        ans = "Yes";
		    }else{
		        ans = "No";
		    }
		}
		
        System.out.println(ans);
	}
}
