import java.util.*;

public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner(System.in);
        String line1 = sc.nextLine();
        String line2 = sc.nextLine();
        line2 = line2.substring(0,line2.length()-1);
        if(line1.equals(line2)){
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    }
} import java.util.*; util.* java public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner(System.in);
        String line1 = sc.nextLine();
        String line2 = sc.nextLine();
        line2 = line2.substring(0,line2.length()-1);
        if(line1.equals(line2)){
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    }
} Main public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner(System.in);
        String line1 = sc.nextLine();
        String line2 = sc.nextLine();
        line2 = line2.substring(0,line2.length()-1);
        if(line1.equals(line2)){
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    } main {
        Scanner sc = new Scanner(System.in);
        String line1 = sc.nextLine();
        String line2 = sc.nextLine();
        line2 = line2.substring(0,line2.length()-1);
        if(line1.equals(line2)){
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) String line1 = sc.nextLine(); line1 sc.nextLine() sc.nextLine sc String line2 = sc.nextLine(); line2 sc.nextLine() sc.nextLine sc line2 = line2.substring(0,line2.length()-1) line2 line2.substring(0,line2.length()-1) line2.substring line2 0 line2.length()-1 line2.length() line2.length line2 1 if(line1.equals(line2)){
            System.out.println("Yes");
        } else {
            System.out.println("No");
        } line1.equals(line2) line1.equals line1 line2 {
            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) throws Exception {
        Scanner sc = new Scanner(System.in);
        String line1 = sc.nextLine();
        String line2 = sc.nextLine();
        line2 = line2.substring(0,line2.length()-1);
        if(line1.equals(line2)){
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    }
} public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner(System.in);
        String line1 = sc.nextLine();
        String line2 = sc.nextLine();
        line2 = line2.substring(0,line2.length()-1);
        if(line1.equals(line2)){
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    }
} Main
import java.util.*;

public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner(System.in);
        String line1 = sc.nextLine();
        String line2 = sc.nextLine();
        line2 = line2.substring(0,line2.length()-1);
        if(line1.equals(line2)){
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    }
}
