#include <bits/stdc++.h>
using namespace std;
int n;
char s1[100][100],s2[100][100],s3[100][100];
void _1(){
	int x = 0,y = n - 1;
	for(int i = 0;i < n;i++){
		for(int j = 0;j < n;j++){
			s3[x][y] = s1[i][j];
			x++;
		}
		y--;
		x = 0;
	}
}
void _2(){
	int x = n - 1,y = n - 1;
	for(int i = 0;i < n;i++){
		for(int j = 0;j < n;j++){
			s3[x][y] = s1[i][j];
			y--;
		}
		x--;
		y = n - 1;
	}
}
void _3(){
	int x = n - 1,y = 0;
	for(int i = 0;i < n;i++){
		for(int j = 0;j < n;j++){
			s3[x][y] = s1[i][j];
			x--;
		}
		y++;
		x = n - 1;
	}
}
void _4(){
	for(int i = 0;i < n;i++)
		for(int j = 0;j < n;j++)
			s3[i][n-j-1] = s1[i][j];
}
void _6(){
	for(int i = 0;i < n;i++)
		for(int j = 0;j < n;j++)
			s3[i][j] = s1[i][j];
}
bool check(){
	for(int i = 0;i < n;i++)
		for(int j = 0;j < n;j++)
			if(s3[i][j] != s2[i][j])
				return 0;
	return 1;
} 
int main(){
	cin >> n;
	for(int i = 0;i < n;i++)
		for(int j = 0;j < n;j++)
			cin >> s1[i][j];
	for(int i = 0;i < n;i++)
		for(int j = 0;j < n;j++)
			cin >> s2[i][j];
	for(int i = 1;i <= 6;i++){
		memset(s3,'?',sizeof(s3));
		switch(i){
			case 1:
				_1();
				if(check()){
					cout << i;
					return 0;
				}
				break;
			case 2:
				_2();
				if(check()){
					cout << i;
					return 0;
				}
				break;
			case 3:
				_3();
				if(check()){
					cout << i;
					return 0;
				}
				break;
			case 4:
				_4();
				if(check()){
					cout << i;
					return 0;
				}
				break;
			case 5:
				_4();
				for(int j = 1;j <= 3;j++){
					switch(j){
						case 1:
							_1();
							if(check()){
								cout << j;
								return 0;
							}
							break;
						case 2:
							_2();
							if(check()){
								cout << j;
								return 0;
							}
							break;
						case 3:
							_3();
							if(check()){
								cout << j;
								return 0;
							}
							break;
					}
				}
				break;
			case 6:
				_6();
				if(check()){
					cout << i;
					return 0;
				}
				break;
		}
	}
	cout << 7;
	return 0;
}

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