#include <cstdio> #include <cstdlib> #include <iostream> #include <string> #include <cmath> #include <algorithm> #include <vector> #include <queue> #include <stack> #include <map> #include <set> #include <cstring> typedef long long ll; using namespace std; #define mod 1000000009 #define INF 10000000 #define LLINF 2000000000000000000LL #define SIZE 101 int main(){ string S; int x=0,y=0; cin >> S; for(int i=0;i<S.size();i++) { switch (S[i]) { case 'N': y++; break; case 'W': x++; break; case 'S': y--; break; case 'E': x--; } } printf("%.5lf\n",sqrt((double)(x*x+y*y))); return 0; }