why ruby asks me to type additional "end" (s) apart from the ones needed for closing loop, function and class.

require "./Contact"

class AddressBook
  attr_accessor :ab_contacts

  $ab_contacts = []

  def intitialize
#    @ab_contacts = Array.new()
  end

  def find_by_name(name)
    puts "-------finding by name -------"
    results = []
    search = name.downcase
    #puts $ab_contacts.class
     $ab_contacts.each do |c|
      if c.first_name.downcase.include?(name)
        results.push(c)
      end
     end

     results.each do |c|
       puts c.to_s('full_name')
       c.print_phone_numbers
       c.print_address
       puts "\n"
     end

  end

  def find_by_phone_number(number)
    puts "-------finding by phone number-----" 
    results = []
    search = number.gsub("-","")
    $ab_contacts.each do |c|
      c.phone_numbers.each do |n|
          if n.number.gsub("-","").include?(search)
            results.push(c) unless results.include?(c)
          end
      # Added "end" here.
      end
    end
    results.each do |c|
      puts c.to_s('full_name')
      c.print_phone_numbers
      c.print_address
      puts "\n"
   end
  end

  def find_by_address(add)
    puts "-----------finding by address------------"
    results = []
    search = query.downcase
    $ab_contacts.each do |c|
      c.addresses.each do |a|
        if a.to_s('long').downcase.include?(search)
          results.push(c) unless results.include?(c)
        end
      end
    end
    results.each do |c|
      puts c.to_s('full_name')
      c.print_phone_numbers
      c.print_address
      puts "\n"
    # Added "end" here.
    end
  end

  def print_contact_list
    $ab_contacts.each do |c|
      puts c.to_s('last_first')
    end
  end

end



me = Contact.new
me.first_name = "AAA"
me.middle_name = "BBB"
me.last_name = "CCC"

me.add_phone_number('first_no', '111111111')
me.add_phone_number('second_no', '2222222222')

me.add_address('Home', "my house", 'my street one', 'my city', "my state", "999999")
me.add_address('Office', 'my office', 'my office street', 'my city', "my state", '9999111')


my_frnd = Contact.new
my_frnd.first_name = "DDD"
my_frnd.middle_name = "EEE"
my_frnd.last_name = "FFF"

my_frnd.add_address('Home', "frnd house", 'frnd street one', 'frnd city', "frnd state", "999999")
my_frnd.add_address('Office', 'frnd office', 'frnd office street', 'frnd city', "frnd state", '9999111')
my_frnd.add_phone_number('first_no', '999999999')
my_frnd.add_phone_number('second_no', '555555555')



address_book = AddressBook.new
#puts address_book.ab_contacts.class.to_s()
$ab_contacts.push(me)
$ab_contacts.push(my_frnd)
#address_book.print_contact_list

address_book.find_by_name("d")
address_book.find_by_phone_number("555")
address_book.find_by_address("frnd")
# All of the above code was PART of the AddressBook class!
# We don't want that. Now that the "end" keywords are in the correct place, it should be OK.
# "end" keywords here are no longer necessary
#  end 
# end