import heapq
def dijkstra(size,cost,start):#startが(0,0)になってるので、適宜変更して入力にも足す
    dist=[float("inf")]*size #dist[i]=0からiまでの最短距離
    dist[start]=0
    h=[]#(0からの暫定距離, 点の番号)というタプルを入れていくheap
    heapq.heappush(h,(0,start))
    while len(h)!=0:
        now=heapq.heappop(h)
        for tup in cost[now[1]]:
            if dist[now[1]]+tup[1]<dist[tup[0]]:
                dist[tup[0]]=dist[now[1]]+tup[1]
                heapq.heappush(h,(dist[tup[0]],tup[0]))
    return dist


def dist0(tup1,tup2):
    return abs(tup1[0]-tup2[0])+abs(tup1[1]-tup2[1])
N,K=map(int,input().split())
sx,sy,gx,gy=map(int,input().split())
ok=3*10**5
ng=0
ji=[tuple(map(int,input().split())) for _ in range(N)]
while ok-ng>1:
    #print(ok,ng)
    now=(ok+ng)//2
    graph=[[] for _ in range(N+2)]
    graph[N].append((N+1,(dist0((sx,sy),(gx,gy))+now-1)//now-1))
    graph[N+1].append((N,(dist0((sx,sy),(gx,gy))+now-1)//now-1))
    for i in range(N):
        graph[i].append((N,(dist0((sx,sy),ji[i])+now-1)//now-1))
        graph[N].append((i,(dist0((sx,sy),ji[i])+now-1)//now-1))
        graph[i].append((N+1,(dist0((gx,gy),ji[i])+now-1)//now-1))
        graph[N+1].append((i,(dist0((gx,gy),ji[i])+now-1)//now-1))
    for i in range(N-1):
        for j in range(i+1,N):
            graph[i].append((j,(dist0(ji[j],ji[i])+now-1)//now-1))
            graph[j].append((i,(dist0(ji[j],ji[i])+now-1)//now-1))
    dist=dijkstra(N+2,graph,N)
    if dist[N+1]<=K:
        ok=now
    else:
        ng=now
print(ok)