#include<stdio.h>
#include<string.h>
#include<stdlib.h>
#include <math.h>






int main(void){
char s[105];
int e=0,n=0;
scanf("%s",s);

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