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.*;
import static java.lang.System.out;
public class Main{
   static Scanner sc = new Scanner(System.in);
   public static void main(String[] args){
      int A = sc.nextInt();
      int B = sc.nextInt();
      String S = sc.next();
      if(S.indexOf("-") == A){
         try{
            Integer.parseInt(S.substring(0,A));
            Integer.parseInt(S.substring(A+1,S.length()));
            System.out.println("Yes");
         }catch(NumberFormatException e){
            System.out.println("No");
         }
      }else{
         out.println("No");
      }
   }
}