#include <stdio.h>
#include <algorithm>
#include <deque>
using namespace std;
using ll = long long;

//113
int main() {
	char s[101];
	scanf("%s", s);
	int n = 0, e = 0;
	for (int i = 0; s[i] != 0; i++) {
		if (s[i] == 'N')
			n++;
		else if (s[i] == 'E')
			e++;
		else if (s[i] == 'W')
			e--;
		else
			n--;
	}

	n = abs(n), e = abs(e);
	printf("%lf\n", sqrt((double)(n * n + e * e)));
}