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 S = sc.next();

    for (int i = 0; i < a; i++) {
      if (S.charAt(i) < '0' || S.charAt(i) > '9') {
        System.out.println("No");
        return;
      }
    }
    for (int i = a + 1; i < a + b + 1; i++) {
      if (S.charAt(i) < '0' || S.charAt(i) > '9') {
        System.out.println("No");
        return;
      }
    }
    if(S.charAt(a) != '-'){
      System.out.println("No");
      return;
    }
    System.out.println("Yes");
  }
}