import sys
input = sys.stdin.readline
from collections import deque

N,V,x,y,zz,ww=map(int,input().split())
MAP=[list(map(int,input().split())) for i in range(N)]

if V>1800:
    print(abs(x-zz)+abs(y-ww))
    exit()

x,y=y,x
zz,ww=ww,zz
x-=1
y-=1
zz-=1
ww-=1
DP=[300]*(N*N*(V+1))

DP[V*(N*N)+x*N+y]=0

Q=deque()
Q.append((0,V,x*N+y))

while Q:
    now,power,xy=Q.popleft()
    if xy==zz*N+ww:
        print(now)
        break

    x=xy//N
    y=xy%N

    for z,w in [(x+1,y),(x-1,y),(x,y+1),(x,y-1)]:
        if 0<=z<N and 0<=w<N:
            nec=z*N+w
            dec=MAP[z][w]

            if power-dec>0 and DP[(power-dec)*N*N+nec]>now+1:
                DP[(power-dec)*N*N+nec]=now+1
                Q.append((now+1,power-dec,nec))

else:
    print(-1)