#include <iostream>
#include <vector>

using namespace std;

struct Point {
    double x;
    double y;
};

double det(const Point &A, const Point &B)
{
    return A.x * B.y - B.x * A.y;
}

void intersection(const Point &A, const Point &B, 
                  const Point &C, const Point &D)
{
    const Point p  = {B.x - A.x, B.y - A.y};
    const Point q  = {D.x - C.x, D.y - C.y};
    const Point PQ = {C.x - A.x, C.y - A.y};

    const double det_pq  = det(p, q);
    const double det_PQq = det(PQ, q);

    if (det_pq == 0 && det_PQq == 0) {
        cout << "Poklapaju se" << endl;
    } else if (det_pq == 0) {
        cout << "Paralelne su" << endl;
    } else {
        double tp = det_PQq / det_pq;
        const Point X = {p.x * tp + A.x, p.y * tp + A.y};
        cout << "Presecna tacka je: [" << X.x << ", " << X.y << "]" << endl;
    }
}

int main(int argc, const char *argv[])
{
    Point A, B, C, D;

    cin >> A.x >> A.y;
    cin >> B.x >> B.y;
    cin >> C.x >> C.y;
    cin >> D.x >> D.y;

    intersection(A, B, C, D);

    return 0;
}