#include <iostream>
#include <string>
#include <cmath>

int main(int argc, char const *argv[])
{
    int x = 0, y = 0;
    std::string buffer;

    std::getline(std::cin, buffer, '\n');

    for (auto i : buffer){
        switch (i){
            case 'W':
                --x;
            break;

            case 'N':
                ++y;
            break;
            case 'E':
                ++x;
            break;
            case 'S':
                --y;
            break;                                    

        }

    }

    std::cout << sqrt(x*x + y*y) << std::endl;


    return 0;
}