#include "bits/stdc++.h"
#define MOD 1000000007
#define INF 11234567890
#define in std::cin
#define out std::cout
#define rep(i,N) for(LL i=0;i<N;++i)
typedef long long int LL;

std::string S;
int x, y;

int main()
{
	in >> S;

	for (auto c : S)
	{
		switch (c)
		{
		case 'N':
			++y;
			break;
		case 'E':
			++x;
			break;
		case 'W':
			--x;
			break;
		case 'S':
			--y;
			break;
		}
	}

	out << sqrt(abs(x)*abs(x) + abs(y)*abs(y)) << std::endl;
	return 0;
}