//Codeforces Round #180 (Div. 2) B Sail
import java.io.*;
import java.io.ObjectInputStream.GetField;
import java.math.*;
import java.text.*;
import java.util.*;
//Codeforces
public class MainCodeforces1 {
private static MyScanner in;
private static PrintStream out;
private static boolean LOCAL_TEST = false;
private static void solve() throws IOException
{
int t = in.nextInt();
int sx = in.nextInt();
int sy = in.nextInt();
int ex = in.nextInt();
int ey = in.nextInt();
String dir = in.nextString();
for (int i = 0; i < dir.length(); i++) {
char c = dir.charAt(i);
if (sx < ex && c == 'E')
sx++;
if (sx > ex && c == 'W')
sx--;
if (sy < ey && c == 'N')
sy++;
if (sy > ey && c == 'S')
sy--;
if (sx == ex && sy == ey) {
out.println(i + 1);
return;
}
}
out.println("-1");
}
public static void main(String[] args) throws IOException {
// helpers for input/output
out = System.out;
try {
String cname = System.getenv("COMPUTERNAME");
LOCAL_TEST = (cname.equals("ALPHA530"));
} catch (Exception e) {
}
if (LOCAL_TEST) {
in = new MyScanner("E:\\zin.txt");
}
else {
boolean usingFileForIO = false;
if (usingFileForIO) {
// using input.txt and output.txt as I/O
in = new MyScanner("input.txt");
out = new PrintStream("output.txt");
}
else {
in = new MyScanner();
out = System.out;
}
}
solve();
}
// =====================================
static class MyScanner {
Scanner inp = null;
public MyScanner() throws IOException
{
inp = new Scanner(System.in);
}
public MyScanner(String inputFile) throws IOException {
inp = new Scanner(new FileInputStream(inputFile));
}
public int nextInt() throws IOException {
return inp.nextInt();
}
public long nextLong() throws IOException {
return inp.nextLong();
}
public double nextDouble() throws IOException {
return inp.nextDouble();
}
public String nextString() throws IOException {
return inp.next();
}
}
}
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