n = gets.chomp
x = y = 0
ans = 1
n.each_char do |c|
  if(c=="N")
    y += 1
  elsif(c=="S")
    y -= 1
  elsif(c=="W")
    x -= 1
  else
    x += 1
  end
end
p (x**2 + y**2)**0.5