import java.util.Scanner;

public class Main {
    public static void main(String args[]){
        Scanner sc = new Scanner(System.in);

        String s = sc.next();
        String t = sc.next();

        StringBuilder sb = new StringBuilder();
        sb.append(t);
        sb.setLength(t.length() - 1);

        if(sb.toString().equals(s)){
            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);

        String s = sc.next();
        String t = sc.next();

        StringBuilder sb = new StringBuilder();
        sb.append(t);
        sb.setLength(t.length() - 1);

        if(sb.toString().equals(s)){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        }
    }
} Main public static void main(String args[]){
        Scanner sc = new Scanner(System.in);

        String s = sc.next();
        String t = sc.next();

        StringBuilder sb = new StringBuilder();
        sb.append(t);
        sb.setLength(t.length() - 1);

        if(sb.toString().equals(s)){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        }
    } main {
        Scanner sc = new Scanner(System.in);

        String s = sc.next();
        String t = sc.next();

        StringBuilder sb = new StringBuilder();
        sb.append(t);
        sb.setLength(t.length() - 1);

        if(sb.toString().equals(s)){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        }
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) String s = sc.next(); s sc.next() sc.next sc String t = sc.next(); t sc.next() sc.next sc StringBuilder sb = new StringBuilder(); sb new StringBuilder() sb.append(t) sb.append sb t sb.setLength(t.length() - 1) sb.setLength sb t.length() - 1 t.length() t.length t 1 if(sb.toString().equals(s)){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        } sb.toString().equals(s) sb.toString().equals sb.toString() sb.toString sb s {
            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);

        String s = sc.next();
        String t = sc.next();

        StringBuilder sb = new StringBuilder();
        sb.append(t);
        sb.setLength(t.length() - 1);

        if(sb.toString().equals(s)){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        }
    }
} public class Main {
    public static void main(String args[]){
        Scanner sc = new Scanner(System.in);

        String s = sc.next();
        String t = sc.next();

        StringBuilder sb = new StringBuilder();
        sb.append(t);
        sb.setLength(t.length() - 1);

        if(sb.toString().equals(s)){
            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);

        String s = sc.next();
        String t = sc.next();

        StringBuilder sb = new StringBuilder();
        sb.append(t);
        sb.setLength(t.length() - 1);

        if(sb.toString().equals(s)){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        }
    }
}
