Given this code, what will be the output?

Given this code, what will be the output?

class A
  def call_me(x)
    x * 2
  end
end

class B < A
  def call_me(x)
    super + 5
  end
end

class C < B
  def call_me(x)
    super(x + 1)
  end
end

puts C.new.call_me(4)