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 ar = sc.next();
String[] s = ar.split("");
               boolean flg = true;
		for(int i = 0; i < a; i++){
                     if( s[i].equals("-")) flg = false;
               }
               if ( !(s[a].equals("-"))) flg =false;
		for(int i = a+1; i < a+b+1; i++){
                     if( s[i].equals("-") )flg =false;
               }
              if (flg)                System.out.print("Yes");
             else  System.out.print("No");
	}
}
