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();
      String pattern = "[0-9]{"+a+"}-[0-9]{"+b+"}";
      if( s.matches(pattern) ) System.out.println("Yes");
      else System.out.println("No");
    }
} import java.util.*; util.* java 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();
      String pattern = "[0-9]{"+a+"}-[0-9]{"+b+"}";
      if( s.matches(pattern) ) System.out.println("Yes");
      else System.out.println("No");
    }
} 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();
      String pattern = "[0-9]{"+a+"}-[0-9]{"+b+"}";
      if( s.matches(pattern) ) System.out.println("Yes");
      else System.out.println("No");
    } main {
    	Scanner sc = new Scanner(System.in);
      int a = sc.nextInt();
      int b = sc.nextInt();
      String s = sc.next();
      String pattern = "[0-9]{"+a+"}-[0-9]{"+b+"}";
      if( s.matches(pattern) ) System.out.println("Yes");
      else System.out.println("No");
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int a = sc.nextInt(); a sc.nextInt() sc.nextInt sc int b = sc.nextInt(); b sc.nextInt() sc.nextInt sc String s = sc.next(); s sc.next() sc.next sc String pattern = "[0-9]{"+a+"}-[0-9]{"+b+"}"; pattern "[0-9]{"+a+"}-[0-9]{"+b+"}" b "}-[0-9]{" "[0-9]{"+a+"}-[0-9]{"+b+"}" "[0-9]{" a "}-[0-9]{" b "}" if( s.matches(pattern) ) System.out.println("Yes");
      else System.out.println("No"); s.matches(pattern) s.matches s pattern System.out.println("Yes") System.out.println System.out System System.out "Yes" System.out.println("No") System.out.println System.out System System.out "No" String[] args args 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();
      String pattern = "[0-9]{"+a+"}-[0-9]{"+b+"}";
      if( s.matches(pattern) ) System.out.println("Yes");
      else System.out.println("No");
    }
} 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();
      String pattern = "[0-9]{"+a+"}-[0-9]{"+b+"}";
      if( s.matches(pattern) ) System.out.println("Yes");
      else System.out.println("No");
    }
} Main
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();
      String pattern = "[0-9]{"+a+"}-[0-9]{"+b+"}";
      if( s.matches(pattern) ) System.out.println("Yes");
      else System.out.println("No");
    }
}