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();
int h=0;
for(int i=0;i<S.length();i++){
    if(i==A){
    if(S.charAt(i)=='-')h++;
    }else {
        if(S.charAt(i)=='-'){
        h=0;break;
        }
    }
    
}
if(h==1){System.out.println("Yes");}else{System.out.println("No");}

}
}