#include<bits/stdc++.h>
#include<windows.h>
#define endl '\n'
using namespace std;
map<string,int> mp;
vector<int> v[10001];
int n,cntq,b[10001],e[10001],cb,ce;
int main()
{
	ios::sync_with_stdio(0);
	cin.tie(0),cout.tie(0);
	cin>>n;
	for(int i=1; i<=n; i++)
	{
		string s1,s2,s3,s4;
		cin>>s1>>s2>>s3>>s4;
		if(!mp[s1]) mp[s1]=++cntq;
		if(!mp[s4]) mp[s4]=++cntq;
		b[mp[s1]]++;
		e[mp[s4]]++;
	}
	for(int i=1; i<=cntq; i++)
	{
		if(b[i]>=2&&e[i]>=1) cb++;
		if(e[i]>=2&&b[i]>=1) ce++;  
	}
	cout<<(cb*cb-1/2)*(ce*ce-1/2);
	return 0;
}