#include<cstdio>
#include<algorithm>
#include<vector>
#define MOD 95617
using namespace std;

struct per{int x, y;};
vector <per> h[MOD], v;

inline int H(int x, int y){
	return abs((3 * x + 7 * y) % MOD);
}

bool Is(int x, int y){
	int i, ind = H(x, y);
	
	for (i = 0; i < (int) h[ind].size(); i++)
		if (h[ind][i].x == x && h[ind][i].y == y) return true;
	return false;
}

int main(){
	int n, i, j, N, x, y, x1, x2, y1, y2;
	freopen("patrate3.in", "r", stdin), freopen("patrate3.out", "w", stdout);
	scanf ("%d", &n);
	
	for (i = 0; i < n; i++){
		scanf("%d.%d %d.%d", &x1, &y1, &x2, &y2);
		x1 > 0 ? x = x1 * 10000 + y1 : x = x1 * 10000 - y1;
		x2 > 0 ? y = x2 * 10000 + y2 : y = x2 * 10000 - y2;
		v.push_back((per) {x, y});
		h[H(x, y)].push_back ((per) {x, y});
	}
	
	for (i = 0, N = 0; i < n; i++)
		for (j = 0; j < n; j++)
			if (i != j){
				x1 = v[i].x + v[i].y - v[j].y;
				y1 = v[i].y - v[i].x + v[j].x;
				x2 = v[j].x - v[j].y + v[i].y;
				y2 = v[j].x + v[j].y - v[i].x;
				if 	(Is(x1, y1) && Is(x2, y2)) N++;
			}
	
	printf("%d", N / 4);
	return 0;
}