#include <bits/stdc++.h>
#define file ""
#define all(x) x.begin(), x.end()
#define sc second
#define fr first
#define pb push_back
#define mp make_pair
using namespace std;
typedef long long ll;
typedef pair<int, int> pii;
const ll inf = 1e18 + 5;
const ll mod = 1e9 + 7;
const int N = 5e5 + 5;
int dx[] = {+1, 0, -1, 0};
int dy[] = {0, +1, 0, -1};
int n, m, r, k, p;
vector<vector<int>> c;
void solve1(int x, int h) {
int cnt = r;
for (int i = 1; i <= m; i++) {
if (cnt == 0) return;
if (c[x][i] >= h) c[x][i]--, cnt--;
}
}
void solve2(int x, int h) {
int cnt = r;
for (int i = m; i >= 1; i--) {
if (cnt == 0) return;
if (c[x][i] >= h) c[x][i]--, cnt--;
}
}
void solve3(int x, int h) {
int cnt = r;
for (int i = n; i >= 1; i--) {
if (cnt == 0) return;
if (c[i][x] >= h) c[i][x]--, cnt--;
}
}
void solve4(int x, int h) {
int cnt = r;
for (int i = 1; i <= n; i++) {
if (cnt == 0) return;
if (c[i][x] >= h) c[i][x]--, cnt--;
}
}
void update(char x) {
int a, b;
cin >> a >> b;
if (x == 'W') solve1(a, b);
if (x == 'E') solve2(a, b);
if (x == 'S') solve3(a, b);
if (x == 'N') solve4(a, b);
}
int get(int x, int y, int a, int b) {
int res = 0;
for (int i = x; i <= a; i++)
for (int j = y; j <= b; j++)
res += c[i][j];
return res;
}
void solve() {
int mx = 0;
for (int i = 1; i <= n; i++)
for (int j = 1; j <= m; j++)
if (i + p - 1 <= n && j + p - 1 <= m)
mx = max(mx, get(i, j, i + p - 1, j + p - 1));
cout << mx, exit(0);
}
int main() {
ios_base :: sync_with_stdio(false);
cin.tie(nullptr);
srand(time(nullptr));
cin >> n >> m >> r >> k >> p;
c.resize(n + 1, vector<int> (m + 1));
for (int i = 1; i <= n; i++)
for (int j = 1; j <= m; j++)
cin >> c[i][j];
while (k--) {
char t;
cin >> t;
update(t);
}
solve();
return 0;
}
