import java.util.Scanner;
public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		String A = sc.next();
		String B = sc.next();
		String S = sc.next();
		if(S.matches("[0-9]{"+A+"}-[0-9]{"+B+"}")) {
			System.out.println("Yes");
		}else {
			System.out.println("No");
		}
		sc.close();
	}
} import java.util.Scanner; Scanner java.util public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		String A = sc.next();
		String B = sc.next();
		String S = sc.next();
		if(S.matches("[0-9]{"+A+"}-[0-9]{"+B+"}")) {
			System.out.println("Yes");
		}else {
			System.out.println("No");
		}
		sc.close();
	}
} Main public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		String A = sc.next();
		String B = sc.next();
		String S = sc.next();
		if(S.matches("[0-9]{"+A+"}-[0-9]{"+B+"}")) {
			System.out.println("Yes");
		}else {
			System.out.println("No");
		}
		sc.close();
	} main {
		Scanner sc = new Scanner(System.in);
		String A = sc.next();
		String B = sc.next();
		String S = sc.next();
		if(S.matches("[0-9]{"+A+"}-[0-9]{"+B+"}")) {
			System.out.println("Yes");
		}else {
			System.out.println("No");
		}
		sc.close();
	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) String A = sc.next(); A sc.next() sc.next sc String B = sc.next(); B sc.next() sc.next sc String S = sc.next(); S sc.next() sc.next sc if(S.matches("[0-9]{"+A+"}-[0-9]{"+B+"}")) {
			System.out.println("Yes");
		}else {
			System.out.println("No");
		} S.matches("[0-9]{"+A+"}-[0-9]{"+B+"}") S.matches S "[0-9]{"+A+"}-[0-9]{"+B+"}" B "}-[0-9]{" "[0-9]{"+A+"}-[0-9]{"+B+"}" "[0-9]{" A "}-[0-9]{" B "}" {
			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" sc.close() sc.close sc String[] args args public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		String A = sc.next();
		String B = sc.next();
		String S = sc.next();
		if(S.matches("[0-9]{"+A+"}-[0-9]{"+B+"}")) {
			System.out.println("Yes");
		}else {
			System.out.println("No");
		}
		sc.close();
	}
} public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		String A = sc.next();
		String B = sc.next();
		String S = sc.next();
		if(S.matches("[0-9]{"+A+"}-[0-9]{"+B+"}")) {
			System.out.println("Yes");
		}else {
			System.out.println("No");
		}
		sc.close();
	}
} Main
import java.util.Scanner;
public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		String A = sc.next();
		String B = sc.next();
		String S = sc.next();
		if(S.matches("[0-9]{"+A+"}-[0-9]{"+B+"}")) {
			System.out.println("Yes");
		}else {
			System.out.println("No");
		}
		sc.close();
	}
}
