#include <iostream>
#include <vector>
#include <set>
#include <queue>
#include <stack>
#include <math.h>
#include <cassert>
#include <bitset>
#include <map>
#include <algorithm>
#include <iterator>
#include <string>
#include <utility>
#include <numeric>
#include <regex>
#include <complex>
#include <random>
#include <atcoder/all>
using namespace atcoder;
using namespace std;
using ll=long long;
using ull=unsigned long long;
using P=pair<ll,ll>;
template<typename T>using minque=priority_queue<T,vector<T>,greater<T>>;
template<typename T>bool chmax(T &a,const T &b){return (a<b?(a=b,true):false);}
template<typename T>bool chmin(T &a,const T &b){return (a>b?(a=b,true):false);}
template<typename T1,typename T2>ostream &operator<<(ostream &os,const pair<T1,T2>&p){os<<p.first<<' '<<p.second;return os;}
template<typename T1,typename T2>istream &operator>>(istream &is,pair<T1,T2>&p){is>>p.first>>p.second;return is;}
template<typename T> ostream &operator<<(ostream &os,const vector<T> &a){cout<<'{';for(int i=0;i<a.size();i++){cout<<a[i];if(i+1!=a.size())cout<<',';};cout<<'}';return os;}
template<typename T>istream &operator>>(istream &is,vector<T> &a){for(auto &i:a)is>>i;return is;}
#define reps(i,a,n) for(int i=(a);i<(n);i++)
#define rep(i,n) reps(i,0,n)
#define all(x) x.begin(),x.end()
#define pcnt(x) __builtin_popcount(x)
ll myceil(ll a,ll b){return (a+b-1)/b;}
template<typename T1,typename ...T2>
void debug(const T1& x,const T2& ...y){
  #ifdef LOCAL
  cout<<x;
  ((cout<<' '<<y),...);
  cout<<'\n';
  #endif
}
void SOLVE();
int main(){
  #ifdef LOCAL
  clock_t start=clock();
  #endif
  int testcase=1;
  //cin>>testcase;
  for(int i=0;i<testcase;i++){
    SOLVE();
  }
  #ifdef LOCAL
  cout<<"time:";
  cout<<(clock()-start)/1000;
  cout<<"ms\n";
  #endif
}
vector<ll> dijkstra(int start,vector<vector<pair<int,int>>> &Graph){
  int n=Graph.size();
  minque<P>que;
  que.push(P(0,start));
  vector<ll>dst(n,1e18);
  dst[start]=0;
  while(!que.empty()){
    auto p=que.top();
    que.pop();
    ll d=p.first;
    int x=p.second;
    if(dst[x]!=d)continue;
    for(auto i:Graph[x]){
      if(dst[i.first]>dst[x]+i.second){
        dst[i.first]=dst[x]+i.second;
        que.push(P(dst[i.first],i.first));
      }
    }
  }
  return dst;
}
void SOLVE(){
  int n,k;
  cin>>n>>k;
  int sx,sy,gx,gy;
  cin>>sx>>sy>>gx>>gy;
  vector<pair<int,int>>a(n+2);
  a[0]={sx,sy};
  a[1]={gx,gy};
  reps(i,2,n+2)cin>>a[i];
  n+=2;
  int ok=1e6,ng=0;
  debug(a);
  while(ok-ng>1){
    int mid=(ok+ng)/2;
    vector<vector<pair<int,int>>>to(n);
    rep(i,n-1)reps(j,i+1,n){
      int dx=a[i].first-a[j].first,dy=a[i].second-a[j].second;
      int p=(abs(dx)+abs(dy)-1)/mid;
      to[i].push_back({j,p});
      to[j].push_back({i,p});
    }
    auto dst=dijkstra(0,to);
    if(dst[1]<=k)ok=mid;
    else ng=mid;
  }
  cout<<ok<<endl;
}