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.Scanner;
import java.io.*;

public class Main {
public static void main(String args[]) {
Scanner cro=new Scanner(System.in);
BufferedReader c=new BufferedReader(new InputStreamReader(System.in));
String s,s1;
int A,B,i,C;
C=0;
A=cro.nextInt();
B=cro.nextInt();
s1=cro.nextLine();
s=cro.nextLine();
for(i=0;i<A;i++) if(Character.isDigit(s.charAt(i))) C++;
if(s.charAt(A)=='-') C++;
for(i=A+1;i<A+B+1;i++) if(Character.isDigit(s.charAt(i))) C++;
if(C==A+B+1) System.out.println("Yes");
else System.out.println("No");
}   
}