import java.util.Scanner;

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

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();
        if(s.matches("^[0-9]{" + a + "}-[0-9]{" + b + "}$")) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    }
}