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 str = sc.next();
    boolean test = true;

    for(int i=0; i < A; i++){
        if(Character.isDigit(str.charAt(i))){
            
        }else{
            test = false;
            break;
        }
    }
    for(int i=A+1; i < A+B+1; i++){
        if(Character.isDigit(str.charAt(i))){
            
        }else{
            test = false;
            break;
        }
    }
    if(str.matches(".*"+"-"+".*")){
         
    }else{
        test = false;
    }
    if(test){
        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 str = sc.next();
    boolean test = true;

    for(int i=0; i < A; i++){
        if(Character.isDigit(str.charAt(i))){
            
        }else{
            test = false;
            break;
        }
    }
    for(int i=A+1; i < A+B+1; i++){
        if(Character.isDigit(str.charAt(i))){
            
        }else{
            test = false;
            break;
        }
    }
    if(str.matches(".*"+"-"+".*")){
         
    }else{
        test = false;
    }
    if(test){
        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 str = sc.next();
    boolean test = true;

    for(int i=0; i < A; i++){
        if(Character.isDigit(str.charAt(i))){
            
        }else{
            test = false;
            break;
        }
    }
    for(int i=A+1; i < A+B+1; i++){
        if(Character.isDigit(str.charAt(i))){
            
        }else{
            test = false;
            break;
        }
    }
    if(str.matches(".*"+"-"+".*")){
         
    }else{
        test = false;
    }
    if(test){
        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 str = sc.next();
    boolean test = true;

    for(int i=0; i < A; i++){
        if(Character.isDigit(str.charAt(i))){
            
        }else{
            test = false;
            break;
        }
    }
    for(int i=A+1; i < A+B+1; i++){
        if(Character.isDigit(str.charAt(i))){
            
        }else{
            test = false;
            break;
        }
    }
    if(str.matches(".*"+"-"+".*")){
         
    }else{
        test = false;
    }
    if(test){
        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 str = sc.next(); str sc.next() sc.next sc boolean test = true; test true for(int i=0; i < A; i++){
        if(Character.isDigit(str.charAt(i))){
            
        }else{
            test = false;
            break;
        }
    } int i=0; int i=0; i 0 i < A i A i++ i++ i {
        if(Character.isDigit(str.charAt(i))){
            
        }else{
            test = false;
            break;
        }
    } {
        if(Character.isDigit(str.charAt(i))){
            
        }else{
            test = false;
            break;
        }
    } if(Character.isDigit(str.charAt(i))){
            
        }else{
            test = false;
            break;
        } Character.isDigit(str.charAt(i)) Character.isDigit Character str.charAt(i) str.charAt str i {
            
        } {
            test = false;
            break;
        } test = false test false break; for(int i=A+1; i < A+B+1; i++){
        if(Character.isDigit(str.charAt(i))){
            
        }else{
            test = false;
            break;
        }
    } int i=A+1; int i=A+1; i A+1 A 1 i < A+B+1 i A+B+1 A+B+1 A B 1 i++ i++ i {
        if(Character.isDigit(str.charAt(i))){
            
        }else{
            test = false;
            break;
        }
    } {
        if(Character.isDigit(str.charAt(i))){
            
        }else{
            test = false;
            break;
        }
    } if(Character.isDigit(str.charAt(i))){
            
        }else{
            test = false;
            break;
        } Character.isDigit(str.charAt(i)) Character.isDigit Character str.charAt(i) str.charAt str i {
            
        } {
            test = false;
            break;
        } test = false test false break; if(str.matches(".*"+"-"+".*")){
         
    }else{
        test = false;
    } str.matches(".*"+"-"+".*") str.matches str ".*"+"-"+".*" ".*"+"-"+".*" ".*" "-" ".*" {
         
    } {
        test = false;
    } test = false test false if(test){
        System.out.println("Yes");
    }else{
        System.out.println("No");
    } test {
        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 str = sc.next();
    boolean test = true;

    for(int i=0; i < A; i++){
        if(Character.isDigit(str.charAt(i))){
            
        }else{
            test = false;
            break;
        }
    }
    for(int i=A+1; i < A+B+1; i++){
        if(Character.isDigit(str.charAt(i))){
            
        }else{
            test = false;
            break;
        }
    }
    if(str.matches(".*"+"-"+".*")){
         
    }else{
        test = false;
    }
    if(test){
        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 str = sc.next();
    boolean test = true;

    for(int i=0; i < A; i++){
        if(Character.isDigit(str.charAt(i))){
            
        }else{
            test = false;
            break;
        }
    }
    for(int i=A+1; i < A+B+1; i++){
        if(Character.isDigit(str.charAt(i))){
            
        }else{
            test = false;
            break;
        }
    }
    if(str.matches(".*"+"-"+".*")){
         
    }else{
        test = false;
    }
    if(test){
        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 str = sc.next();
    boolean test = true;

    for(int i=0; i < A; i++){
        if(Character.isDigit(str.charAt(i))){
            
        }else{
            test = false;
            break;
        }
    }
    for(int i=A+1; i < A+B+1; i++){
        if(Character.isDigit(str.charAt(i))){
            
        }else{
            test = false;
            break;
        }
    }
    if(str.matches(".*"+"-"+".*")){
         
    }else{
        test = false;
    }
    if(test){
        System.out.println("Yes");
    }else{
        System.out.println("No");
    }
  }
}