import java.util.Scanner;

public class Main {
    public static void main(String[] args) throws Exception {
        Scanner scanner = new Scanner(System.in);
        
        String id = scanner.nextLine();
        StringBuilder addOneId = new StringBuilder(scanner.nextLine());
        StringBuilder aoi = new StringBuilder(addOneId.deleteCharAt(addOneId.length()-1));
        
        if(id.equals(aoi.toString())) {
            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) throws Exception {
        Scanner scanner = new Scanner(System.in);
        
        String id = scanner.nextLine();
        StringBuilder addOneId = new StringBuilder(scanner.nextLine());
        StringBuilder aoi = new StringBuilder(addOneId.deleteCharAt(addOneId.length()-1));
        
        if(id.equals(aoi.toString())) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    }
} Main public static void main(String[] args) throws Exception {
        Scanner scanner = new Scanner(System.in);
        
        String id = scanner.nextLine();
        StringBuilder addOneId = new StringBuilder(scanner.nextLine());
        StringBuilder aoi = new StringBuilder(addOneId.deleteCharAt(addOneId.length()-1));
        
        if(id.equals(aoi.toString())) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    } main {
        Scanner scanner = new Scanner(System.in);
        
        String id = scanner.nextLine();
        StringBuilder addOneId = new StringBuilder(scanner.nextLine());
        StringBuilder aoi = new StringBuilder(addOneId.deleteCharAt(addOneId.length()-1));
        
        if(id.equals(aoi.toString())) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    } Scanner scanner = new Scanner(System.in); scanner new Scanner(System.in) String id = scanner.nextLine(); id scanner.nextLine() scanner.nextLine scanner StringBuilder addOneId = new StringBuilder(scanner.nextLine()); addOneId new StringBuilder(scanner.nextLine()) StringBuilder aoi = new StringBuilder(addOneId.deleteCharAt(addOneId.length()-1)); aoi new StringBuilder(addOneId.deleteCharAt(addOneId.length()-1)) if(id.equals(aoi.toString())) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        } id.equals(aoi.toString()) id.equals id aoi.toString() aoi.toString aoi {
            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 scanner = new Scanner(System.in);
        
        String id = scanner.nextLine();
        StringBuilder addOneId = new StringBuilder(scanner.nextLine());
        StringBuilder aoi = new StringBuilder(addOneId.deleteCharAt(addOneId.length()-1));
        
        if(id.equals(aoi.toString())) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    }
} public class Main {
    public static void main(String[] args) throws Exception {
        Scanner scanner = new Scanner(System.in);
        
        String id = scanner.nextLine();
        StringBuilder addOneId = new StringBuilder(scanner.nextLine());
        StringBuilder aoi = new StringBuilder(addOneId.deleteCharAt(addOneId.length()-1));
        
        if(id.equals(aoi.toString())) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    }
} Main
import java.util.Scanner;

public class Main {
    public static void main(String[] args) throws Exception {
        Scanner scanner = new Scanner(System.in);
        
        String id = scanner.nextLine();
        StringBuilder addOneId = new StringBuilder(scanner.nextLine());
        StringBuilder aoi = new StringBuilder(addOneId.deleteCharAt(addOneId.length()-1));
        
        if(id.equals(aoi.toString())) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    }
}