s = gets.chomp
l = s.length
x, y = 0, 0

l.times do |i|
    case s[i]
    when "N"
        y += 1
    when "E"
        x += 1
    when "S"
        y -= 1
    when "W"
        x -= 1
    end
end

puts Math.sqrt(x ** 2 + y ** 2)