#include<bits/stdc++.h>
using namespace std;

#define REP(i,a,b) for(i=a;i<b;i++)
#define rep(i,n) REP(i,0,n)

#define mygc(c) (c)=getchar_unlocked()
#define mypc(c) putchar_unlocked(c)

#define ll long long
#define ull unsigned ll

void reader(int *x){int k,m=0;*x=0;for(;;){mygc(k);if(k=='-'){m=1;break;}if('0'<=k&&k<='9'){*x=k-'0';break;}}for(;;){mygc(k);if(k<'0'||k>'9')break;*x=(*x)*10+k-'0';}if(m)(*x)=-(*x);}
void reader(int *x, int *y){reader(x);reader(y);}
void reader(int *x, int *y, int *z){reader(x);reader(y);reader(z);}
void reader(ll *x){int k,m=0;*x=0;for(;;){mygc(k);if(k=='-'){m=1;break;}if('0'<=k&&k<='9'){*x=k-'0';break;}}for(;;){mygc(k);if(k<'0'||k>'9')break;*x=(*x)*10+k-'0';}if(m)(*x)=-(*x);}
int reader(char c[]){int i,s=0;for(;;){mygc(i);if(i!=' '&&i!='\n'&&i!='\r'&&i!='\t'&&i!=EOF) break;}c[s++]=i;for(;;){mygc(i);if(i==' '||i=='\n'||i=='\r'||i=='\t'||i==EOF) break;c[s++]=i;}return s;}

void writer(int x, char c){int s=0,m=0;char f[10];if(x<0)m=1,x=-x;while(x)f[s++]=x%10,x/=10;if(!s)f[s++]=0;if(m)mypc('-');while(s--)mypc(f[s]+'0');mypc(c);}
void writer(ll x, char c){int s=0,m=0;char f[20];if(x<0)m=1,x=-x;while(x)f[s++]=x%10,x/=10;if(!s)f[s++]=0;if(m)mypc('-');while(s--)mypc(f[s]+'0');mypc(c);}
void writer(const char c[]){int i;for(i=0;c[i]!='\0';i++)mypc(c[i]);}

int N, V, SX, SY, GX, GY;
int L[111][111];

int dist[111][111][2222];
int q[22200222], q_st, q_size;

int main(){
  int i, j, k, d, m, ni, nj, nk, nn;
  int di[4]={-1,1,0,0}, dj[4]={0,0,-1,1};
  int res;
  
  reader(&N,&V); V--;
  reader(&SY,&SX); SY--; SX--;
  reader(&GY,&GX); GY--; GX--;
  rep(i,N) rep(j,N) reader(L[i]+j);

  if(V >= 2 * N * 9){
    writer(abs(SX-GX)+abs(SY-GY),'\n');
    return 0;
  }

  rep(i,N) rep(j,N) rep(k,V+1) dist[i][j][k] = -1;
  dist[SX][SY][V] = 0;
  q_st = q_size = 0;
  q[q_st+q_size++] = (SX*N+SY)*(V+1)+V;

  res = -1;
  while(q_size){
    m = q[q_st++]; q_size--;
    k = m%(V+1); m /= V+1;
    i = m/N; j = m%N;
    rep(d,4){
      ni = i + di[d];
      nj = j + dj[d];
      if(ni < 0 || nj < 0 || ni >= N || nj >= N) continue;
      nk = k - L[ni][nj];
      if(nk < 0) continue;
      if(dist[ni][nj][nk] >= 0) continue;
      
      nn = (ni*N+nj)*(V+1)+nk;
      dist[ni][nj][nk] = dist[i][j][k] + 1;
      if(ni==GX && nj==GY){ res = dist[ni][nj][nk]; break; }
      q[q_st+q_size++] = nn;
    }
    if(res >= 0) break;
  }

  writer(res,'\n');

  return 0;
}