#include<bits/stdc++.h>
using namespace std;

int main(){
	cin.tie(0),ios::sync_with_stdio(false);
	string s; cin>>s;
	unordered_map<char,int>m;
	for(auto&&i:s)++m[i];
	auto sq=[](int a){return (uint64_t)a*a;};
	cout<<sqrtl(sq(abs(m['N']-m['S']))+sq(m['W']-m['E']))<<"\n"s;
}