uniqueID.rb

def uid(length=10)
  dictionary = %w[A C D E F H J K L M N P R T W X Y Z 3 4 6 7 9]
  dictionary_length = dictionary.length
  uid = ''

  (1..length).each do |n|
     uid << dictionary[rand(0..dictionary_length)].to_s
  end
  
  uid
end

puts uid