#include <cmath>
#include <cstdlib>

#include <iostream>
#include <vector>

int main() {
  long temp;
  long count = 0;
  long i, j, k;
  std::string str;
  long x, y;
  x = y = 0;


  std::cin >> str;

  for(i = 0; i < str.size(); i++) {
    switch(str[i]) {
    case 'E':
      x += 1;
      break;
    case 'N':
      y += 1;
      break;
    case 'S':
      y -= 1;
      break;
    case 'W':
      x -= 1;
      break;
    }
  }

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

  return 0;
}