#include <vector>
#include <list>
#include <map>
#include <set>
#include <deque>
#include <stack>
#include <bitset>
#include <algorithm>
#include <functional>
#include <numeric>
#include <utility>
#include <sstream>
#include <iostream>
#include <iomanip>
#include <cstdio>
#include <cmath>
#include <cstdlib>
#include <cctype>
#include <string>
#include <cstring>
#include <ctime>
#include <fstream>
#include <queue>
#include <complex>

#define INF_MIN 100000000
#define INF 1145141919
#define INF_MAX 2147483647
#define LL_MAX 9223372036854775807
#define EPS 1e-10
#define PI acos(-1)
#define LL long long

using namespace std;

#define MAX_N 101
#define MAX_V 10001

int N, V, Sx, Sy, Gx, Gy;

int maze[MAX_N][MAX_N];
int dp[MAX_N][MAX_N][MAX_V];

int dx[] = {1,0,-1,0};
int dy[] = {0,1,0,-1};

typedef pair<int, int> P;
typedef pair<P, P> PP;

int solve(){

  dp[Sy][Sx][V] = 0;
  
  queue<PP> que;
  que.push(PP(P(Sx, Sy), P(V, -1)));

  while(que.size()){

    PP p = que.front();
    que.pop();
    int x = p.first.first, y = p.first.second;
    int v = p.second.first;
    int preDir = p.second.second;

    if(Gx == x && Gy == y)
      return dp[y][x][v];

    for(int d = 0; d < 4; d++){
      if(d == preDir)
	continue;
      int nx = x + dx[d];
      int ny = y + dy[d];
      int nextDir = (d + 2) % 4;
      if(0 <= nx && nx < N && 0 <= ny && ny < N){
	int nextV = v - maze[ny][nx];
	if(nextV > 0 && dp[ny][nx][nextV] > dp[y][x][v] + 1){
	  dp[ny][nx][nextV] = dp[y][x][v] + 1;
	  que.push(PP(P(nx, ny), P(nextV, nextDir)));
	}
      }
    }
    
  }
  
  return -1;

}

int main(){

  cin >> N >> V >> Sx >> Sy >> Gx >> Gy;
  
  Sx--; Sy--;
  Gx--; Gy--;
  
  for(int i = 0; i < N; i++){
    for(int j = 0; j < N; j++){
      cin >> maze[i][j];
      for(int k = 0; k <= V; k++){
	dp[i][j][k] = INF;
      }
    }
  }

  cout << solve() << endl;

  return 0;

}