//#pragma GCC target("avx2")
//#pragma GCC optimize("O3")
//#pragma GCC optimize("unroll-loops")
#include <iostream>
#include <iomanip>
#include <algorithm>
#include <vector>
#include <string>
#include <set>
#include <map>
#include <cassert>
#include <cmath>
#include <tuple>
#include <queue>
#include <bitset>
using namespace std;
using lg = long long;
#define TEST clog << "TEST" << endl
#define IINF 2147483647
#define LLINF 9223372036854775807LL
#define AMARI 998244353
#define TEMOTO ((sizeof(long double) == 16) ? false : true)
#define TIME_LIMIT 950 * (TEMOTO ? 1 : 1000)
#define el '\n'
#define El '\n'

//疑似乱数(XorShift)
unsigned long xor128(void) {
    static unsigned long x = 123456789, y = 362436069, z = 521288629, w = 88675123;
    unsigned long t = (x xor (x << 11));
    x = y; y = z; z = w;
    return (w = (w xor (w >> 19)) xor (t xor (t >> 8)));
}

int wakusei_num, station_num;

class planet {
public:
    int x;
    int y;
    int num;
};

bool hikaku_rad(planet a, planet b) {
    return (atan2(a.y - 500, a.x - 500) < atan2(b.y - 500, b.x - 500));
}

int planet_distance(planet const& a, planet const& b) {
    int ans = (a.x - b.x) * (a.x - b.x);
    ans += (a.y - b.y) * (a.y - b.y);
    return ans;
}

class station {
public:
    int x;
    int y;
    int num;
};

vector<planet> wakusei(100);

//a番目とa+1番目をswapすることを考える
int kinbou_hyouka(int a) {
    //(a-1,a)と(a+1,a+2)を引く
    if (a <= 0 || a + 2 >= 100)return IINF;
    int ans = -1 * planet_distance(wakusei[a - 1], wakusei[a]);
    ans -= planet_distance(wakusei[a + 1], wakusei[a + 2]);

    //(a-1,a+1)と(a,a+2)を足す
    ans += planet_distance(wakusei[a - 1], wakusei[a + 1]);
    ans += planet_distance(wakusei[a], wakusei[a + 2]);
    return ans;
}

#define MULTI_TEST_CASE false
void solve(void) {
    cin >> wakusei_num >> station_num;
    for (int i = 0; i < wakusei_num; i++) {
        cin >> wakusei[i].x >> wakusei[i].y;
        wakusei[i].num = i;
    }
    clock_t start = clock();


    for (int i = 0; i < station_num; i++) {
        cout << "0 0" << El;
    }
    cout << wakusei_num + 1 << el;
    sort(wakusei.begin(), wakusei.end(), hikaku_rad);

    while (clock() - start <= TIME_LIMIT) {
        int rand_num = xor128() % 100;
        if (kinbou_hyouka(rand_num) < 0) {
            swap(wakusei[rand_num], wakusei[rand_num + 1]);
        }
    }
    
    for (int i = 0; i < wakusei_num; i++) {
        if (!wakusei[i].num) {
            for (int j = i; j <= i + wakusei_num; j++) {
                cout << "1 " << wakusei[j % wakusei_num].num + 1 << el;
            }
            break;
        }
    }
    return;
}

void calc(void) {
    return;
}

int main(void) {
    cin.tie(nullptr);
    ios::sync_with_stdio(false);
    int t = 1;
    if (MULTI_TEST_CASE)cin >> t;
    while (t--) {
        solve();
    }
    calc();
    return 0;
}