#include<bits/stdc++.h>
using namespace std;
string a[10005],b[10005],c[10005],d[10005];
int main()
{
	int n;
	cin>>n;
	int cnt = 0;
	for(int i=1;i<=n;i++)
	{
		cin>>a[i]>>b[i]>>c[i]>>d[i];
	}
	for(int i=1;i<=n-3;i++)
	{
		if(a[i]!=a[i+1]&&a[i]!=a[i+2]&&a[i]!=a[i+3]&&a[i]!=b[i]&&a[i]!=b[i+1]&&a[i]!=b[i+2]&&a[i]!=b[i+3]&&a[i]!=c[i]&&a[i]!=c[i+1]&&a[i]!=c[i+2]&&a[i]!=c[i+3]&&a[i]!=d[i]&&a[i]!=d[i+1]&&a[i]!=d[i+2]&&a[i]!=d[i+3]&&b[i]!=a[i+1]&&b[i]!=a[i+2]&&b[i]!=a[i+3]&&b[i]!=b[i+1]&&b[i]!=b[i+2]&&b[i]!=b[i+3]&&b[i]!=c[i]&&b[i]!=c[i+1]&&b[i]!=c[i+2]&&b[i]!=c[i+3]&&b[i]!=d[i]&&b[i]!=d[i+1]&&b[i]!=d[i+2]&&b[i]!=d[i+3]&&c[i]!=a[i+1]&&c[i]!=a[i+2]&&c[i]!=a[i+3]&&c[i]!=b[i+1]&&c[i]!=b[i+2]&&c[i]!=b[i+3]&&c[i]!=c[i+1]&&c[i]!=c[i+2]&&c[i]!=c[i+3]&&c[i]!=d[i]&&c[i]!=d[i+1]&&c[i]!=d[i+2]&&c[i]!=d[i+3]&&d[i]!=a[i+1]&&d[i]!=a[i+2]&&d[i]!=a[i+3]&&d[i]!=b[i+1]&&d[i]!=b[i+2]&&d[i]!=b[i+3]&&d[i]!=c[i+1]&&d[i]!=c[i+2]&&d[i]!=c[i+3]&&d[i]!=d[i+1]&&d[i]!=d[i+2]&&d[i]!=d[i+3]&&a[i+1]!=a[i+2]&&a[i+1]!=a[i+3]&&a[i+2]!=a[i+3]&&b[i+1]!=b[i+2]&&b[i+1]!=b[i+3])
		{
			if(a[i+1]!=b[i+1]&&a[i+1]!=b[i+2]&&a[i+1]!=b[i+3]&&a[i+1]!=c[i+1]&&a[i+1]!=c[i+2]&&a[i+1]!=c[i+3]&&a[i+1]!=d[i+1]&&a[i+1]!=d[i+2]&&a[i+1]!=d[i+3])
			{
				if(b[i+1]!=c[i+1]&&b[i+1]!=c[i+2]&&b[i+1]!=c[i+3]&&b[i+1]!=d[i+1]&&b[i+1]!=d[i+2]&&b[i+1]!=d[i+3]&&c[i+1]!=d[i+1]&&c[i+1]!=d[i+2]&&c[i+1]!=d[i+3])
				{
					if(a[i+2]!=b[i+2]&&a[i+2]!=b[i+3]&&a[i+2]!=c[i+2]&&a[i+2]!=c[i+3]&&a[i+2]!=d[i+2]&&a[i+2]!=d[i+3])
					{
						if(a[i+3]!=b[i+3]&&a[i+3]!=c[i+3]&&a[i+3]!=d[i+3])
						{
							if(b[i+2]!=c[i+2]&&b[i+2]!=c[i+3]&&b[i+2]!=d[i+2]&&b[i+2]!=d[i+3])
							{
								if(b[i+3]!=c[i+3]&&b[i+3]!=d[i+3]&&c[i+3]!=d[i+3])
								{
									if(c[i+2]!=d[i+2]&&c[i+2]!=d[i+3])
									{
										cnt++;
									}
								}
							}
						}
					}
				}
			}
		}
	}
	cout<<cnt;
	return 0;
}