#include <iostream>
using namespace std;

int main()
{
	int n,s = 0;
	cin >> n;
	string a[n+1][5];
	for (int i = 1;i<=n;i++)
	{
		cin >> a[i][1] >> a[i][2] >> a[i][3] >> a[i][4];
	}
	for (int i = 1;i<=n-5;i++)
	{
		string s1 = a[i][1]+a[i][2]+a[i][3]+a[i][4];
		string s2 = a[i+1][1]+a[i+1][2]+a[i+1][3]+a[i+1][4];
		string s3 = a[i+2][1]+a[i+2][2]+a[i+2][3]+a[i+2][4];
		string s4 = a[i+3][1]+a[i+3][2]+a[i+3][3]+a[i+3][4];
		string s5 = a[i+4][1]+a[i+4][2]+a[i+4][3]+a[i+4][4];
		string s6 = a[i+5][1]+a[i+5][2]+a[i+5][3]+a[i+5][4];
		if (s1 != s2 && s1 != s3 && s1 != s4 && s1 != s5 && s1 != s6 && s2 != s3 && s2 != s4 && s2 != s5 && s2 != s6 && s3 != s4 && s4 != s5 && s3 != s6 && s4 != s5 && s4 != s6 && s5 != s6 && a[i+3][4] == a[i][1] && a[i][4] == a[i+1][1] && a[i+1][4] == a[i+2][1] && a[i+2][4] == a[i+3][1] && a[i+3][4] == a[i+4][1] && a[i+4][4] == a[i+2][1] && a[i+5][1] == a[i+1][1] && a[i+5][4] == a[i+3][1])
		{
			s++;
		}
	}  
	cout << s;
	return 0;
}