#include<stdio.h>

int main()

{

	int i,j,n,t = 1,l = 0,cnt = 0,ret = 7;
	scanf("%d",&n);
    getchar();
	getchar();
	char first[n][n];
	char last[n][n];
	char first1[n][n];
	for(i = 0;i < n;i++){
		for (j = 0;j < n;j++){
			scanf("%1s",&first[i][j]);
		}
		getchar();
		getchar();
	}
	for(i = 0;i < n;i++){
		for(j = 0;j < n;j++){
			scanf("%1s",&last[i][j]);
		}
		getchar();
		getchar();
	}
    
	for(i = 0;i < n&&t==1;i++){
		for(j = 0;j < n&&t==1;j++){
            l = 6;
		if(first[i][j] != last[i][j]){
				l = 0;
           t = 0;
                }
		}
	}
	if(l == 6)
	ret = 6;
    t = 1;
	for(i = 0;i < n;i++){
		for(j = 0;j < n;j++){
			first1[i][n-1-j] = first[i][j];
		}
	}
	for(i = 0;i < n&&t==1;i++){
		for(j = 0;j < n&&t==1;j++){
            l = 5;
		if(first1[i][j] != last[j][n-1-i]){
				l = 0;
                t = 0;
                }
		}
	}
	if(l == 5)
	ret = 5;
    t = 1;
	for(i = 0;i < n&&t==1;i++){
		for(j = 0;j < n&&t==1;j++){
            l = 5;
		if(first1[i][j] != last[n-1-i][n-1-j]){
				l = 0;
                t = 0;
                }
		}
	}
	if(l == 5)
	ret = 5;
    t = 1;
	for(i = 0;i < n&&t==1;i++){
		for(j = 0;j < n&&t==1;j++){
            l = 5;
		if(first1[i][j] != last[n-j-1][i]){
				l = 0;
                t = 0;
                }
		}
	}
	if(l == 5)
	ret = 5;
    t = 1;
	for(i = 0;i < n&&t==1;i++){
		for(j = 0;j < n&&t==1;j++){
            l = 4;
		if(first[i][j] != last[i][n-1-j]){
				l = 0;
                t = 0;
                }
		}
	}
	if(l == 4)
	ret = 4;
    t = 1;
	for(i = 0;i < n&&t==1;i++){
		for(j = 0;j < n&&t==1;j++){
            l = 3;
		if(first[i][j] != last[n-j-1][i]){
				l = 0;
                t = 0;
                }
		}
	}
	if(l == 3)
	ret = 3;
    t = 1;
	for(i = 0;i < n&&t==1;i++){
		for(j = 0;j < n&&t==1;j++){
            l = 2;
	if(first[i][j] != last[n-1-i][n-1-j]){
                l = 0;
                t = 0;
                }
		}
	}
	if(l == 2)
	ret = 2;
    t = 1;
	for(i = 0;i < n&&t==1;i++){
		for(j = 0;j < n&&t==1;j++){
            l = 1;
		if(first[i][j] != last[j][n-1-i]){
				l = 0;
                t = 0;
                }
		}
	}
	if(l == 1)
	ret = 1;
	printf("%d",ret);
	return 0;
}