str = gets
x = 0
y = 0
str.each_char do |c|
    if c == "N"
        y += 1
    elsif c == "E"
        x += 1
    elsif c == "S"
        y -= 1
    elsif c == "W"
        x -= 1
    end
end
puts Math.sqrt(x ** 2 + y ** 2)