#include <iostream>
#include <string>
#include <cmath>
int main() {
    float x=0,y=0;
    std::string s;
    std::cin>>s;
    for(auto& c:s) {
             if (c=='N')y+=1;
        else if (c=='E')x+=1;
        else if (c=='S')y-=1;
        else if (c=='W')x-=1;
    }
    std::cout<<std::sqrt(x*x+y*y)<<std::endl;
}