#include <bits/stdc++.h>
using namespace std;
long long t, sx, sy, ex, ey;
int e, s, n, w;
string ch;
int main() {
  cin >> t >> sx >> sy >> ex >> ey;
  if (sx < ex)
    e = ex - sx;
  else
    w = sx - ex;
  if (sy < ey)
    n = ey - sy;
  else
    s = sy - ey;
  cin >> ch;
  long long d = 1;
  for (long long i = 0; i < t; i++) {
    if (ch[i] == 'S')
      s--;
    else if (ch[i] == 'N')
      n--;
    else if (ch[i] == 'E')
      e--;
    else
      w--;
    if ((s <= 0 && n <= 0) && (e <= 0 && w <= 0)) {
      d = 0;
      cout << i + 1 << endl;
      break;
    }
  }
  if (d == 1) cout << -1 << endl;
}
