diff --git a/a.rb b/a.rb
deleted file mode 100755
index f287f46..0000000
--- a/a.rb
+++ /dev/null
@@ -1,79 +0,0 @@
-#!/usr/bin/env ruby
-#encoding: utf-8
-
-$: << 'lib'
-
-require 'biju'
-require 'pp'
-
-#str = 'www.ruby-lang.org and bonjour www.rubygarden.org coucou'
-#re = /
-#      (               # capture the hostname in $1
-#        (?:           # these parens for grouping only
-#          (?! [-_] )  # lookahead for neither underscore nor dash
-#          [\w-] +     # hostname component
-#          \.          # and the domain dot
-#        ) +           # now repeat that whole thing a bunch of times
-#        [A-Za-z]      # next must be a letter
-#        [\w-] +       # now trailing domain part
-#      )               # end of $1 capture
-#     /x               # /x for nice formatting
-#str = '((www.ruby-lang.org), (www.rubygarden.org), (www.co.com) ucou)'
-strs = []
-strs << '((www.ruby-lang.org), (www.rubygarden.org), (www.co.com) (u)cou)'
-strs << '(www.ruby-lang.org), (www.rubygarden.org), (www.co.com) (u)'
-
-re =  /
-        \(             # parenthese
-          (
-            #[^\(\)]*?
-            [\(\)]*?
-            .*?
-          )
-        \)             # parenthese
-      /x
-
-strs.each do |str|
-  pp "STR : #{str}"
-  str.gsub! re do      # pass a block to execute replacement
-    pp $1
-  end
-end
-
-exit
-
-puts "here"
-hayes = Biju::HayesSms.new
-pp hayes.attention
-pp hayes.answer = 'OK'
-pp hayes.ok?
-pp hayes.init_modem
-pp hayes.answer = 'OK'
-pp hayes.ok?
-pp hayes.text_mode
-pp (hayes.answer = 'OK')
-pp hayes.ok?
-pp hayes.prefered_storage?
-pp hayes.answer = '+CPMS: ("ME","MT","SM","SR"),("ME","MT","SM","SR"),("ME","MT","SM","SR")'
-# ((),(),())
-# (),(),()
-# 1,2
-
-pp hayes.ok?
-
-exit
-
-@modem = Biju::Modem.new(:port => "/dev/ttyUSB0", :pin => '2382')
-
-# method to list all messages
-@modem.messages.each do |sms|
-  puts sms
-end
-
-# method to send sms
-sms = Biju::Sms.new(:phone_number => "0668486469", :message => 'hello world3')
-puts @modem.send(sms)
-
-@modem.close
-
-