#include <iostream>
#include <fstream>
#include <cmath>

using namespace std;


ifstream input_stream;


struct Point
{
	double x;
	double y;
	Point(double i, double j): x(i), y(j) {

	}
};


double getDistance(Point *p1, Point *p2) {
	double x_distance = abs(p1 -> x - p2 -> x);
	double y_distance = abs(p1 -> y - p2 -> y);
	return pow(x_distance, 2) + pow(y_distance, 2);
}



uint16_t findSides(Point *points[3]) {
	double d1 = getDistance(points[0], points[1]);
	double d2 = getDistance(points[0], points[2]);
	double d3 = getDistance(points[1], points[2]);

	if (d1 == d2 && d1 == d3) {
		return 3;
	}

	return 1;
}



int main() {
	input_stream.open("input.txt");

	Point *points[3];

	for (uint8_t i = 0; i < 3; i++) {
		double tmp_x, tmp_y;
		input_stream >> tmp_x;
		input_stream >> tmp_y;

		points[i] = new Point(tmp_x, tmp_y);
	}

	cout << findSides(points) << endl;

	input_stream.close();
	return 0;
}