/* Author : Mychecksdead */
#include<bits/stdc++.h>
using namespace std;
#define ll long long int
#define MOD (1000000000+7)
#define MOD1 (998244353)
#define pb push_back
#define all(x) x.begin(), x.end()
#define en cout << '\n'
#define ff first
#define ss second
#define pii pair<int,int>
#define vi vector<int>
const int N = 1e6+100, M = 1e5+10, K = 52, MX = 30;
int n, k;
array<int, 4> a[N];
void solve(){
cin >> n >> k;
vector<array<int, 4>> p;
for(int i = 1; i <= n; ++i){
cin >> a[i][0] >> a[i][1] >> a[i][2] >> a[i][3];
p.pb(a[i]);
}
vi XS, YS;
for(int j = 0; j < k; ++j){
int X = 1000000001;
vector<array<int, 4>> np;
for(auto x: p){
X = min(X, x[2]);
}
for(auto x: p){
if(x[0] <= X && X <= x[2]){
// nothing to do actually
}else{
np.pb(x);
}
}
np.swap(p);
XS.pb(X);
}
assert(p.empty());
for(int i = 1; i <= n; ++i){
p.pb(a[i]);
}
for(int j = 0; j < k; ++j){
int Y = 1000000001;
vector<array<int, 4>> np;
for(auto x: p){
Y = min(Y, x[3]);
}
for(auto x: p){
if(x[1] <= Y && Y <= x[3]){
// nothing to do actually
}else{
np.pb(x);
}
}
np.swap(p);
YS.pb(Y);
}
assert(p.empty());
assert(XS.size() * YS.size() <= k*k);
if(XS.size() * YS.size() <= k){
for(int x: XS){
for(int y: YS) {cout << x << ' ' << y << '\n'; k--;}
}
for(int i = 0; i < k; ++i) cout << 1 << ' ' << 1 << '\n';
return;
}
vector<array<int, 2>> P;
for(int x: XS){
for(int y: YS) P.pb({x, y});
}
int m = P.size();
for(int j = 0; j < (1<<m); ++j){
if(__builtin_popcount(j) != k) continue;
bool ok = true;
vector<array<int, 2>> v;
for(int jj = 0; jj < m; ++jj){
if((1<<jj)&j) v.pb(P[jj]);
}
for(int i = 1; i <= n; ++i){
bool f = false;
for(auto [x,y]: v){
if(a[i][0] <= x && x <= a[i][2] && a[i][1] <= y && y <= a[i][3]){
f = true;
}
}
ok = ok & f;
}
if(ok){
for(auto [x, y]: v){
cout << x << ' ' << y << '\n';
}
return;
}
}
vi v;
for(int i = 0; i < MOD; ++i){
v.pb(i);
}
}
int main(){
cin.tie(0); ios::sync_with_stdio(0);
int tt = 1, aa;
// freopen("in.txt", "r", stdin);
// freopen("out.txt", "w", stdout);
while(tt--){
solve();
}
cerr<<"time taken : "<<(float)clock()/CLOCKS_PER_SEC<<" seconds\n";
return 0;
}
