#include <bits/stdc++.h>
using namespace std;
string s[2005][2005];
int main()
{
	ios::sync_with_stdio(0);
	cin.tie(0); cout.tie(0);
	int n;
	cin>>n;
	for (int i=1; i<=n; i++)
	{
		for (int j=1; j<=4; j++)
		{
			cin>>s[i][j];
			//cout<<s[i][j]<<'\n';
		}
	}/*
	for (int k=1; k<=n/4; k++)
	{
		string work1="",work2="",work3="",work4="",work5="",work6="";
		for (int j=1; j<=4; j++)
		{
			work1+=s[1][j];
			work2+=s[4][j];
		}
		for (int i=k; i<=k+4; i++)
		{
			work3+=s[i][1];
			work4+=s[i][4];
		}
		int x=0;
		for (int j=1; j<=4; j++)
		{
			x++;
			work5+=s[x][j];
		}
		int y=4;
		for (int j=4; j>=1; j--)
		{
			work6+=s[y][j];
			y--;
		}
		reverse(work6.begin(),work6.end());
		//cout<<work1<<" "<<work2<<" "<<work3<<" "<<work4<<" "<<work5<<" "<<work6<<'\n';
	}*/
	cout<<1;
	return 0;
}