#include <algorithm>
#include <bitset>
#include <stack>
#include <queue>
#include <set>
#include <map>
#include <iomanip>
#include <cmath>
#include <ctime>
#include <cstring>
#include <string>
#include <cstdlib>
using namespace std;

#ifndef ONLINE_JUDGE
#include <fstream>
ifstream cin ("f.in");
ofstream cout ("f.out");
#else
#include <iostream>
#endif // ONLINE_JUDGE

int N, K;
double BossX, BossY;

double DistSQ(double Ax, double Ay, double Bx, double By)
{
    return sqrt((Ax - Bx) * (Ax - Bx) + (Ay - By) * (Ay - By));
}

vector <pair<double, pair<int,int > > > V;



int main()
{
    cin >> N >> K >> BossX >> BossY;
    for (int i = 1; i <= N; ++i)
    {
        int x, y;
        cin >> x >> y;
        V.push_back({DistSQ(BossX, BossY, x, y), {x, y}});
    }
    sort(V.begin(), V.end());
    for (int i = 0; i < min(K, N); ++i)
        cout << V[i].second.first << ' ' << V[i].second.second << '\n';
};