#include <iostream>
#include <iomanip>
#include <cstdlib>
#include <algorithm>
#include <vector>
#include <queue>
#include <stack>
#include <climits>
#include <string>
#include <set>
#include <cmath>
#include <map>
#include <unordered_map>
#include <numeric>
#include <random>
#include <memory>
#include <chrono>
#include <iterator>
#include <functional>
#include <unordered_set>
#include <cassert>
#ifdef LOCAL
#include "debug.h"
#else
#define debug(x...)
#endif
//#pragma GCC optimize("Ofast")
//#define int ll



using namespace std;
typedef long long ll;
typedef long double ld;
typedef pair < int, int > pii;
typedef pair < ll, ll > pll;
#define sz(x) int((x).size())

#ifndef LOCAL
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
#else
mt19937 rng(228);
#endif

const int N = 1e3 + 7;
const int inf = INT_MAX / 2;
const ll INF = LLONG_MAX / 3;
const int MOD = 1e9 + 7;
const double eps = 1e-6;
const string cars[] = {"🚗", "🚕", "🚙"};

struct Node {
    int x, y, l, w;

    bool check() {
        return (--l) <= 0;
    }
};

int n, m, sx, sy, fx, fy, d[N][N];
char a[N][N];
short used[N][N];
queue < Node > q;
pii p[N][N];

void go(int x, int y, int px, int py) {
    if (x >= 1 && x <= n && y >= 1 && y <= m && !used[x][y] && a[x][y] != '#') {
        used[x][y] = 1;
        if (a[x][y] == '.') {
            q.push({ x, y, 1, d[px][py] + 1 });
            p[x][y] = { px, py };
        }
        else {
            q.push({ x, y, 2, d[px][py] + 2 });
            p[x][y] = { px, py };
        }
    }
}

void bfs() {
    q.push({ sx, sy, 0, 0 });
    used[sx][sy] = 1;

    while (!q.empty()) {
        auto u = q.front();
        q.pop();

        if (u.check()) {
            d[u.x][u.y] = u.w;

            go(u.x + 1, u.y, u.x, u.y);
            go(u.x - 1, u.y, u.x, u.y);
            go(u.x, u.y + 1, u.x, u.y);
            go(u.x, u.y - 1, u.x, u.y);
        }
        else {
            q.push(u);
        }
    }
}

signed main() {
#ifdef LOCAL
    freopen("input.txt", "r", stdin);
    freopen("output.txt", "w", stdout);
#endif
    cout << fixed << setprecision(4);
    ios::sync_with_stdio(false);
    cin.tie();
    cout.tie();

    cin >> n >> m >> sx >> sy >> fx >> fy;

    for (int i = 1; i <= n; i++) {
        for (int j = 1; j <= m; j++) {
            cin >> a[i][j];
        }
    }

    bfs();

    if (!used[fx][fy]) {
        return cout << "-1", 0;
    }

    cout << d[fx][fy] << "\n";

    vector < pii > path;
    for (pii i = { fx, fy }; i != pii{ sx, sy }; i = p[i.first][i.second]) {
        path.push_back(i);
    }
    path.push_back({ sx, sy });
    reverse(path.begin(), path.end());

    for (int i = 1; i < sz(path); i++) {
        int dx = path[i].first - path[i - 1].first;
        int dy = path[i].second - path[i - 1].second;

        if (dx == 1) {
            cout << 'S';
        }
        else if (dx == -1) {
            cout << 'N';
        }
        else if (dy == 1) {
            cout << 'E';
        }
        else {
            cout << 'W';
        }
    }

    return 0;
}