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);
    
		// 整数の入力
		int a = sc.nextInt();
		int b = sc.nextInt();

		// 文字列の入力
		String[] s = sc.next().split("");
        String ans = "Yes";
        for(int i = 0; i < s.length; i++) {
          if (i == a) {
            if (!s[a].equals("-")) {
              ans = "No";
              break;
            }
          } else {
            if (s[i].equals("-")) {
              ans = "No";
              break;
            }
          }
        }
      
		// 出力
		System.out.println(ans);
	}
}