print((function (f, s)
	return f(s)
end)(function (s)
	local x,y = 0,0
	for i=1,#s do
		local c = s:sub(i,i)
		if c=="E" then x=x+1 end
		if c=="W" then x=x-1 end
		if c=="S" then y=y-1 end
		if c=="N" then y=y+1 end
	end
	return math.sqrt(math.pow(x,2)+math.pow(y,2))
end, io.stdin:read("*l")))