#include<stdio.h>
#include<stdlib.h>
#include <math.h>
int main() {
	char s[105];
	int e = 0, n = 0;
	scanf("%s", s);

	for (int i=0;s[i];i++){
		s[i]=='N'?n++:n;
		s[i]=='E'?e++:e;
		s[i]=='W'?e--:e;
		s[i]=='S'?n--:n;
	}
	printf("%lf", (double)sqrt(e * e + n * n));
}