import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Main {
	public static void main(String[] args) {
		BufferedReader buff = new BufferedReader(new InputStreamReader(System.in));

		try {
			String line = buff.readLine();
			int x = 0, y = 0;

			for (int i = 0; i < line.length(); ++i) {
				if (line.charAt(i) == 'N') {
					++y;
				} else if (line.charAt(i) == 'E') {
					++x;
				} else if (line.charAt(i) == 'S') {
					--y;
				} else {
					--x;
				}
			}

			double ans = Math.sqrt((Math.pow(x, 2) + Math.pow(y, 2)));

			System.out.println(ans);

		} catch (NumberFormatException e) {
			e.getStackTrace();
		} catch (IOException e) {
			e.getStackTrace();
		} catch (Exception e) {
			e.getStackTrace();
		}
	}
}