How to call a module method if I don't have access to the instance method for that class?

importmodel.rb

#!/usr/bin/ruby
require 'pry'

module MB
  def welcome
    puts "mb"
    # mb_old_welcome
  end
end

class A

  include MB

  def welcome
    puts "a"
  end

  puts "INSTANCE_METHODS: #{ instance_methods.include?(:welcome) }"
  alias_method :mb_old_welcome, :welcome
  remove_method :welcome
  puts "INSTANCE_METHODS STILL?: #{ instance_methods.include?(:welcome) }"

end


bla = A.new
bla.welcome

output

francesco@Francesco-Deb:~/Desktop$ ./importmodule.rb 
INSTANCE_METHODS: true
INSTANCE_METHODS STILL?: true
mb