import 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();

        String res = "Yes";
        for (int i = 0; i < s.length(); i++) {
            if (s.charAt(i) != t.charAt(i)) {
                res = "No";
                break;
            }
        }

        System.out.println(res);
    }
} import java.util.*; util.* java public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String s = sc.next();
        String t = sc.next();

        String res = "Yes";
        for (int i = 0; i < s.length(); i++) {
            if (s.charAt(i) != t.charAt(i)) {
                res = "No";
                break;
            }
        }

        System.out.println(res);
    }
} Main public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String s = sc.next();
        String t = sc.next();

        String res = "Yes";
        for (int i = 0; i < s.length(); i++) {
            if (s.charAt(i) != t.charAt(i)) {
                res = "No";
                break;
            }
        }

        System.out.println(res);
    } main {
        Scanner sc = new Scanner(System.in);
        String s = sc.next();
        String t = sc.next();

        String res = "Yes";
        for (int i = 0; i < s.length(); i++) {
            if (s.charAt(i) != t.charAt(i)) {
                res = "No";
                break;
            }
        }

        System.out.println(res);
    } 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 String res = "Yes"; res "Yes" for (int i = 0; i < s.length(); i++) {
            if (s.charAt(i) != t.charAt(i)) {
                res = "No";
                break;
            }
        } int i = 0; int i = 0; i 0 i < s.length() i s.length() s.length s i++ i++ i {
            if (s.charAt(i) != t.charAt(i)) {
                res = "No";
                break;
            }
        } {
            if (s.charAt(i) != t.charAt(i)) {
                res = "No";
                break;
            }
        } if (s.charAt(i) != t.charAt(i)) {
                res = "No";
                break;
            } s.charAt(i) != t.charAt(i) s.charAt(i) s.charAt s i t.charAt(i) t.charAt t i {
                res = "No";
                break;
            } res = "No" res "No" break; System.out.println(res) System.out.println System.out System System.out res 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();

        String res = "Yes";
        for (int i = 0; i < s.length(); i++) {
            if (s.charAt(i) != t.charAt(i)) {
                res = "No";
                break;
            }
        }

        System.out.println(res);
    }
} public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String s = sc.next();
        String t = sc.next();

        String res = "Yes";
        for (int i = 0; i < s.length(); i++) {
            if (s.charAt(i) != t.charAt(i)) {
                res = "No";
                break;
            }
        }

        System.out.println(res);
    }
} Main
import 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();

        String res = "Yes";
        for (int i = 0; i < s.length(); i++) {
            if (s.charAt(i) != t.charAt(i)) {
                res = "No";
                break;
            }
        }

        System.out.println(res);
    }
}