import java.io.*;

class Process {
    private String S;
    
    Process(String S) {
        this.S = S;
    }

    double getResult() {
        // 各方角の文字の数を格納する配列
        // 添え字の小さい順から、北、東、西、南
        var directionCount = new int[4];
        for(int i = 0; i < S.length(); i++) {
            switch(S.charAt(i)) {
                case 'N':
                    directionCount[0]++;
                    break;
                case 'E':
                    directionCount[1]++;
                    break;
                case 'W':
                    directionCount[2]++;
                    break;
                case 'S':
                    directionCount[3]++;
                    break;
            }
        }
        
        // 東西方向の移動距離
        int horizontalDistance = Math.abs(directionCount[1] - directionCount[2]);
        
        // 南北方向の移動距離
        int verticalDistance   = Math.abs(directionCount[0] - directionCount[3]);

        return Math.sqrt(Math.pow(horizontalDistance, 2) + Math.pow(verticalDistance, 2));
    }
}

public class Main {
    public static void main(String[] args) throws IOException {
        var bufferedReader = new BufferedReader(new InputStreamReader(System.in));
        var printWriter    = new PrintWriter(new BufferedWriter(new OutputStreamWriter(System.out)));

        // 入力
        String S = bufferedReader.readLine().trim();
        
        // 処理および出力
        printWriter.println((new Process(S)).getResult());

        bufferedReader.close();
        printWriter.close();
    }
}