#include<bits/stdc++.h>
using namespace std;
struct c
{
    int l,r,d,u;
};
signed main()
{
    ios::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    int n,k,num=1;
    cin>>n>>k;
    map<int,c>m;
    c x;
    cin>>x.l>>x.d>>x.r>>x.u;
    m[1]=x;
    for(int i=1;i<n;i++)
    {
        cin>>x.l>>x.d>>x.r>>x.u;
        bool b=0;
        for(int j=1;j<=num;j++)
        {
            if(x.l<=m[j].l&&x.r>=m[j].r)
            {
               if(x.d<=m[j].d&&x.u>=m[j].u){b=1;break;}
               else if(x.d>=m[j].d&&x.d<=m[j].u){m[j].d=x.d;b=1;break;}
               else if(x.u>=m[j].d&&x.u<=m[j].u){m[j].u=x.u;b=1;break;}
            }
            else if(x.l>=m[j].l&&x.l<=m[j].r)
            {
               if(x.d<=m[j].d&&x.u>=m[j].u){m[j].l=x.l;b=1;break;}
               else if(x.d>=m[j].d&&x.d<=m[j].u){m[j].l=x.l;m[j].d=x.d;b=1;break;}
               else if(x.u>=m[j].d&&x.u<=m[j].u){m[j].l=x.l;m[j].u=x.u;b=1;break;}
            }
            else if(x.r>=m[j].l&&x.r<=m[j].r)
            {
               if(x.d<=m[j].d&&x.u>=m[j].u){m[j].r=x.r;b=1;break;}
               else if(x.d>=m[j].d&&x.d<=m[j].u){m[j].r=x.r;m[j].d=x.d;b=1;break;}
               else if(x.u>=m[j].d&&x.u<=m[j].u){m[j].r=x.r;m[j].u=x.u;b=1;break;}
            }
        }
        if(!b)
        {
            num++;
            m[num]=x;
        }
    }
    for(int i=1;i<=num;i++)
    {
        cout<<m[i].l<<" "<<m[i].d<<'\n';
    }
    for(int i=k-num;i>0;i--)cout<<m[1].l<<" "<<m[1].d<<'\n';
}
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