#include <bits/stdc++.h>

#define REP(i, x, n) for(int i = x; i < (int)(n); i++)
#define rep(i, n) REP(i, 0, n)
#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()
#define F first
#define S second
#define mp make_pair

using namespace std;

typedef long long ll;
typedef unsigned long long ull;
typedef pair<int, int> P;

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

struct State {
  int x, y, damage;
  State(int x, int y, int d): x(x), y(y), damage(d) {}
};

int N, V, SX, SY, GX, GY;
int L[100][100];
int minCost[100][100][2000];

int solve() {
  SX--;
  SY--;
  GX--;
  GY--;
  V = min(2000, V);
  rep(i, N) rep(j, N) rep(k, V) minCost[i][j][k] = 1 << 29;
  
  queue<State> Q;
  Q.push(State(SX, SY, 0));
  minCost[SY][SX][0] = 0;

  while(!Q.empty()) {
    State stt = Q.front();
    Q.pop();

    if(stt.x == GX && stt.y == GY) {
      return minCost[stt.y][stt.x][stt.damage];
    }

    rep(i, 4) {
      int nx = dx[i] + stt.x;
      int ny = dy[i] + stt.y;
      if(!(0 <= nx && nx < N && 0 <= ny && ny < N)) continue;
      if(stt.damage + L[ny][nx] >= V) continue;
      if(minCost[ny][nx][stt.damage + L[ny][nx]] <= minCost[stt.y][stt.x][stt.damage] + 1) continue;
      minCost[ny][nx][stt.damage + L[ny][nx]] = minCost[stt.y][stt.x][stt.damage] + 1;
      Q.push(State(nx, ny, stt.damage + L[ny][nx]));
    }
  }

  return -1;
}

int main() {
  // ios_base::sync_with_stdio(false);
  cin >> N >> V >> SX >> SY >> GX >> GY;
  rep(i, N) rep(j, N) cin >> L[i][j];
  cout << solve() << endl;
  return 0;
}