diff --git a/ruby/bob/bob.rb b/ruby/bob/bob.rb
index 70ea19d..621b81e 100644
--- a/ruby/bob/bob.rb
+++ b/ruby/bob/bob.rb
@@ -1,18 +1,54 @@
+# class Bob
 class Bob
   def self.hey(remark)
-    remark.gsub!(/[[:space:]]+/, '')
-    if remark == ''
-      'Fine. Be that way!'
-    elsif remark.upcase == remark and remark =~ /[A-Za-z]+/
-      if remark[-1] == '?'
-        "Calm down, I know what I'm doing!"
-      else
-        'Whoa, chill out!'
-      end
-    elsif remark[-1] == '?'
-      'Sure.'
+    response = Response.new(remark)
+    if silence?(remark)
+      response.silence
+    elsif shout?(remark)
+      response.shouted_at
+    elsif question?(remark)
+      response.question
     else
-      'Whatever.'
+      response.default
     end
   end
+
+  def self.silence?(remark)
+    remark.strip.empty?
+  end
+
+  def self.shout?(remark)
+    remark.upcase == remark && remark =~ /[A-Za-z]+/
+  end
+
+  def self.question?(remark)
+    remark.strip.end_with?('?')
+  end
+end
+
+# Response
+class Response
+  def initialize(remark)
+    @remark = remark.strip
+  end
+
+  def silence
+    'Fine. Be that way!'
+  end
+
+  def shouted_at
+    if @remark.end_with?('?')
+      "Calm down, I know what I'm doing!"
+    else
+      'Whoa, chill out!'
+    end
+  end
+
+  def question
+    'Sure.'
+  end
+
+  def default
+    'Whatever.'
+  end
 end