#include <sstream> #include <string> #include <vector> #include <map> #include <algorithm> #include <iostream> #include <utility> #include <set> #include <cctype> #include <queue> #include <stack> #include <cstdio> #include <cstdlib> #include <cmath> #define INF 1000000000 using namespace std; typedef long long ll; int main(void) { int tate = 0, yoko = 0; string s; cin >> s; for (int i =0; i < s.size(); i++) { if (s[i] == 'N') tate++; if (s[i] == 'S') tate--; if (s[i] == 'E') yoko++; if (s[i] == 'W') yoko--; } double ret = sqrt(tate*tate+yoko*yoko); printf("%.10lf\n", ret); return 0; }