Problem:
Score : 200 points

Problem Statement

You are given an image A composed of N rows and N columns of pixels, and a template image B composed of M rows and M columns of pixels.

A pixel is the smallest element of an image, and in this problem it is a square of size 1×1.

Also, the given images are binary images, and the color of each pixel is either white or black.

In the input, every pixel is represented by a character: . corresponds to a white pixel, and # corresponds to a black pixel.

The image A is given as N strings A_1,...,A_N.

The j-th character in the string A_i corresponds to the pixel at the i-th row and j-th column of the image A (1≦i,j≦N).

Similarly, the template image B is given as M strings B_1,...,B_M.

The j-th character in the string B_i corresponds to the pixel at the i-th row and j-th column of the template image B (1≦i,j≦M).

Determine whether the template image B is contained in the image A when only parallel shifts can be applied to the images.

Constraints

1≦M≦N≦50

A_i is a string of length N consisting of # and ..

B_i is a string of length M consisting of # and ..

Input

The input is given from Standard Input in the following format:

N M
A_1
A_2
:
A_N
B_1
B_2
:
B_M

Output

Print Yes if the template image B is contained in the image A. Print No otherwise.

Sample Input 1

3 2
#.#
.#.
#.#
#.
.#

Sample Output 1

Yes

The template image B is identical to the upper-left 2 × 2 subimage and the lower-right 2 × 2 subimage of A. Thus, the output should be Yes.

Sample Input 2

4 1
....
....
....
....
#

Sample Output 2

No

The template image B, composed of a black pixel, is not contained in the image A composed of white pixels.

Solution in Java8 (OpenJDK 1.8.0) (judge verdict: Accepted)

import java.util.Scanner;
public class Main {
 
	public static void main(String[] args) {
		// TODO 自動生成されたメソッド・スタブ
		Scanner scan = new Scanner(System.in);
		int A =scan.nextInt();
		int B =scan.nextInt();
		int counts=0;
        char[][] a = new char[A][A];
        char[][] b = new char[B][B];
        for(int i=0;i<A;i++){
        	char[] c=scan.next().toCharArray();
        	for(int f=0;f<A;f++){
        	a[i][f] =c[f];
        	}
        }
        for(int i=0;i<B;i++){
        char[] c=scan.next().toCharArray();
        	for(int f=0;f<B;f++){
        	b[i][f] =c[f];
        	}
        }
        for(int j=0;j<=A-B;j++){
        for(int g=0;g<=A-B;g++){
        	counts=0;
        for(int i=0;i<B;i++){
        	int count =0;
        	for(int f=0;f<B;f++){
        		if(a[i+j][f+g]==b[i][f]){
        			count++;
        		}else{
        			break;
        		}
        	}
        	if(count==B){
        		counts++;
        	}else{
        		break;
        	}
        	if(counts==B){
        		System.out.println("Yes");
        		System.exit(0);
        	}
        }
        }
	}
        System.out.println("No");
	}
	public static char[] cha(String s){
		char a[] = new char[s.length()];
		for(int i=0;i<s.length();i++){
			a[i]=s.charAt(i);
		}
		return a;
	}}