Given the below hierarchy how many ways can you think of to wrap the `Parent#foo` implementation so that `Grandchild1` and `Grandchild2` can have their own unique logic that executes after all of the mixin `foo`(s) but before the `Parent#foo` executes?

the_world_of_foos.rb

module N
  def foo
    puts "N: foo" 
    super
  end
end

module O
  def foo
    puts "O: foo" 
    super
  end
end

class Parent
  def foo
    puts "foo"
  end
end

class Child < Parent
  include N
end

class Grandchild1 < Child
  include O
end

class Grandchild2 < Child
  include O
end

# Say we want this to wrap the this to output: 
#  O: foo
#  N: foo
#  Grandchild1 special foo
#  foo
Grandchild1.new.foo

# And we wanted this to output:
#  O: foo
#  N: foo
#  Grandchild2 special fu
#  foo
Grandchild2.new.foo