tate = 0
yoko = 0
gets.chomp.chars.each do |d|
  if d == 'N'
    tate += 1
  elsif d == 'E'
    yoko += 1
  elsif d == 'W'
    yoko -=1
  else
    tate -=1
  end
end
puts (tate**2 + yoko**2) ** 0.5