import java.io.IOException;
import java.io.InputStream;
import java.util.*;

public class Main {
    public static void main(String[] args) {
        FastScanner sc = new FastScanner();
        int N = sc.nextInt();
        int M = sc.nextInt();
        char[][] pictureA = new char[N][N];
        char[][] pictureB = new char[M][M];
        for (int y = 0; y < N; y++) {
            String str = sc.next();
            for (int x = 0; x < N; x++) {
                pictureA[y][x] = str.charAt(x);
            }
        }

        for (int y = 0; y < M; y++) {
            String str = sc.next();
            for (int x = 0; x < M; x++) {
                pictureB[y][x] = str.charAt(x);
            }
        }

        boolean exist = false;

        // N-M は正方形がN*Nの中にM*Mの正方形が成り立つ範囲
        for (int ly = 0; ly <= N - M; ly++) {
            for (int lx = 0; lx <= N - M; lx++) {
                boolean match = true;
                for (int y = 0; y < M; y++) {
                    for (int x = 0; x < M; x++) {
                        if (pictureA[ly + y][lx + x] != pictureB[y][x]) match = false;
                    }
                }
                if (match) exist = true;
            }
        }
        if (exist) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    }

    static class FastScanner {
        private final InputStream in = System.in;
        private final byte[] buffer = new byte[1024];
        private int ptr = 0;
        private int buflen = 0;

        private boolean hasNextByte() {
            if (ptr < buflen) {
                return true;
            } else {
                ptr = 0;
                try {
                    buflen = in.read(buffer);
                } catch (IOException e) {
                    e.printStackTrace();
                }
                if (buflen <= 0) {
                    return false;
                }
            }
            return true;
        }

        private int readByte() {
            if (hasNextByte()) return buffer[ptr++];
            else return -1;
        }

        private static boolean isPrintableChar(int c) {
            return 33 <= c && c <= 126;
        }

        public boolean hasNext() {
            while (hasNextByte() && !isPrintableChar(buffer[ptr])) ptr++;
            return hasNextByte();
        }

        public String next() {
            if (!hasNext()) throw new NoSuchElementException();
            StringBuilder sb = new StringBuilder();
            int b = readByte();
            while (isPrintableChar(b)) {
                sb.appendCodePoint(b);
                b = readByte();
            }
            return sb.toString();
        }

        public long nextLong() {
            if (!hasNext()) throw new NoSuchElementException();
            long n = 0;
            boolean minus = false;
            int b = readByte();
            if (b == '-') {
                minus = true;
                b = readByte();
            }
            if (b < '0' || '9' < b) {
                throw new NumberFormatException();
            }
            while (true) {
                if ('0' <= b && b <= '9') {
                    n *= 10;
                    n += b - '0';
                } else if (b == -1 || !isPrintableChar(b)) {
                    return minus ? -n : n;
                } else {
                    throw new NumberFormatException();
                }
                b = readByte();
            }
        }

        public int nextInt() {
            long nl = nextLong();
            if (nl < Integer.MIN_VALUE || nl > Integer.MAX_VALUE) throw new NumberFormatException();
            return (int) nl;
        }

        public double nextDouble() {
            return Double.parseDouble(next());
        }
    }
}

Measured memory_bytes: 21204