import java.util.Scanner;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class Main {

	public static void main(String[] args) {

		@SuppressWarnings("resource")
		Scanner sc = new Scanner(System.in);
		int a = sc.nextInt();
		int b = sc.nextInt();
		String s = sc.next();

		Pattern p = Pattern.compile("^[0-9]{"+a+"}-[0-9]{"+b+"}");
		Matcher m = p.matcher(s);
		if (m.find()) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}
	}
} import java.util.Scanner; Scanner java.util import java.util.regex.Matcher; Matcher java.util.regex import java.util.regex.Pattern; Pattern java.util.regex public class Main {

	public static void main(String[] args) {

		@SuppressWarnings("resource")
		Scanner sc = new Scanner(System.in);
		int a = sc.nextInt();
		int b = sc.nextInt();
		String s = sc.next();

		Pattern p = Pattern.compile("^[0-9]{"+a+"}-[0-9]{"+b+"}");
		Matcher m = p.matcher(s);
		if (m.find()) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}
	}
} Main public static void main(String[] args) {

		@SuppressWarnings("resource")
		Scanner sc = new Scanner(System.in);
		int a = sc.nextInt();
		int b = sc.nextInt();
		String s = sc.next();

		Pattern p = Pattern.compile("^[0-9]{"+a+"}-[0-9]{"+b+"}");
		Matcher m = p.matcher(s);
		if (m.find()) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}
	} main {

		@SuppressWarnings("resource")
		Scanner sc = new Scanner(System.in);
		int a = sc.nextInt();
		int b = sc.nextInt();
		String s = sc.next();

		Pattern p = Pattern.compile("^[0-9]{"+a+"}-[0-9]{"+b+"}");
		Matcher m = p.matcher(s);
		if (m.find()) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}
	} @SuppressWarnings("resource")
		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 Pattern p = Pattern.compile("^[0-9]{"+a+"}-[0-9]{"+b+"}"); p Pattern.compile("^[0-9]{"+a+"}-[0-9]{"+b+"}") Pattern.compile Pattern "^[0-9]{"+a+"}-[0-9]{"+b+"}" b "}-[0-9]{" "^[0-9]{"+a+"}-[0-9]{"+b+"}" "^[0-9]{" a "}-[0-9]{" b "}" Matcher m = p.matcher(s); m p.matcher(s) p.matcher p s if (m.find()) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		} m.find() m.find m {
			System.out.println("Yes");
		} System.out.println("Yes") System.out.println System.out System System.out "Yes" {
			System.out.println("No");
		} 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) {

		@SuppressWarnings("resource")
		Scanner sc = new Scanner(System.in);
		int a = sc.nextInt();
		int b = sc.nextInt();
		String s = sc.next();

		Pattern p = Pattern.compile("^[0-9]{"+a+"}-[0-9]{"+b+"}");
		Matcher m = p.matcher(s);
		if (m.find()) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}
	}
} public class Main {

	public static void main(String[] args) {

		@SuppressWarnings("resource")
		Scanner sc = new Scanner(System.in);
		int a = sc.nextInt();
		int b = sc.nextInt();
		String s = sc.next();

		Pattern p = Pattern.compile("^[0-9]{"+a+"}-[0-9]{"+b+"}");
		Matcher m = p.matcher(s);
		if (m.find()) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}
	}
} Main
import java.util.Scanner;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class Main {

	public static void main(String[] args) {

		@SuppressWarnings("resource")
		Scanner sc = new Scanner(System.in);
		int a = sc.nextInt();
		int b = sc.nextInt();
		String s = sc.next();

		Pattern p = Pattern.compile("^[0-9]{"+a+"}-[0-9]{"+b+"}");
		Matcher m = p.matcher(s);
		if (m.find()) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}
	}
}