// countm.cpp : Defines the entry point for the console application.
//

#include<iostream>
#include<fstream>
#include<algorithm>
#include<vector>


using namespace std;

struct Point{
	int x;
	int y;
	Point(int x_, int y_ ) {
		x = x_;
		y = y_;
	}
	bool operator < (Point& other){
		return y < other.y;
	}
};

int main() {
	ifstream in("countm.in");
	ofstream out("countm.out");
	int n;
	const long module = 1000000007;
	in>>n;
	vector<Point> v;
	long x,y;
	for ( int i = 0 ; i < n ; i ++ ) {
		in>>x>>y;
		v.push_back(Point(x,y));
	}
	sort(v.begin(), v.end() );
	long cnt = 0;
	long size = v.size();
	for ( vector<Point>::iterator first = v.begin(); first != v.end() ; first++ ){
		for ( vector<Point>::iterator second = first + 1; second != v.end() ; second++) {
			if (second->x == first->x){
				continue;
			}
			for ( vector<Point>::iterator third  = second + 1; third != v.end() ; third++ ){
				if ( third->x == first->x || third->x == second->x ){
					continue;
				}
				for ( vector<Point>::iterator fourth = third + 1; fourth != v.end(); fourth ++ ){
					if ( fourth->x == third->x || fourth->x == second->x || fourth->x == first->x  ){
						continue;
					}
					for ( vector<Point>::iterator fifth = fourth + 1; fifth != v.end(); fifth++ ){
						if ( fifth->x != fourth->x && fifth->x != third->x && fifth->x != second->x && fifth->x != first->x ){
							++cnt;
						}
					}//end of fifth cycle
					cnt = cnt % module;
				}//end of fourth cyclle
			}//end of third cycle
		}//end of second cycle
	}//end of first cycle
	out<<cnt<<endl;
	return 0;
}