.patch

diff --git a/bot/event_handler.py b/bot/event_handler.py
index 6f20bd2..31c8fb6 100644
--- a/bot/event_handler.py
+++ b/bot/event_handler.py
@@ -17,13 +17,14 @@ class RtmEventHandler(object):

     def _handle_by_type(self, event_type, event):
         # See https://api.slack.com/rtm for a full list of events
+        #logger.warning('Handle type {0} {1}'.format(event_type, event))
         if event_type == 'error':
             # error
             self.msg_writer.write_error(event['channel'], json.dumps(event))
         elif event_type == 'message':
             # message was sent to channel
             self._handle_message(event)
-        elif event_type == 'channel_joined':
+        elif event_type == 'channel_joined' or event_type=='team_join':
             # you joined a channel
             self.msg_writer.write_help_message(event['channel'])
         elif event_type == 'group_joined':
@@ -37,6 +38,13 @@ class RtmEventHandler(object):
         if ('user' in event) and (not self.clients.is_message_from_me(event['user'])):

             msg_txt = event['text']
+            #name = event.get('user_profile', {}).get('name', 'noname')
+
+            if 'leave' in event.get('subtype', ''):
+                self.msg_writer.write_leave(event['channel'], event['user'])
+
+            if 'join' in event.get('subtype', ''):
+                self.msg_writer.write_join(event['channel'],event['user'])

             if self.clients.is_bot_mention(msg_txt) or self._is_direct_message(event['channel']):
                 # e.g. user typed: "@pybot tell me a joke!"
diff --git a/bot/messenger.py b/bot/messenger.py
index 6cacf9e..63f81a1 100644
--- a/bot/messenger.py
+++ b/bot/messenger.py
@@ -20,21 +20,36 @@ class Messenger(object):

     def write_help_message(self, channel_id):
         bot_uid = self.clients.bot_user_id()
-        txt = '{}\n{}\n{}\n{}'.format(
-            "I'm your friendly Slack bot written in Python.  I'll *_respond_* to the following commands:",
-            "> `hi <@" + bot_uid + ">` - I'll respond with a randomized greeting mentioning your user. :wave:",
-            "> `<@" + bot_uid + "> joke` - I'll tell you one of my finest jokes, with a typing pause for effect. :laughing:",
-            "> `<@" + bot_uid + "> attachment` - I'll demo a post with an attachment using the Web API. :paperclip:")
+        #txt = '{}\n{}\n{}\n{}'.format(
+        #    "I'm your friendly Slack bot written in Python.  I'll *_respond_* to the following commands:",
+        #    "> `hi <@" + bot_uid + ">` - I'll respond with a randomized greeting mentioning your user. :wave:",
+        #    "> `<@" + bot_uid + "> joke` - I'll tell you one of my finest jokes, with a typing pause for effect. :laughing:",
+        #    "> `<@" + bot_uid + "> attachment` - I'll demo a post with an attachment using the Web API. :paperclip:")
+        txt = u"Что такое интеграл?"
         self.send_message(channel_id, txt)

     def write_greeting(self, channel_id, user_id):
-        greetings = ['Hi', 'Hello', 'Nice to meet you', 'Howdy', 'Salutations']
-        txt = '{}, <@{}>!'.format(random.choice(greetings), user_id)
+        #greetings = ['Hi', 'Hello', 'Nice to meet you', 'Howdy', 'Salutations']
+        #txt = '{}, <@{}>!'.format(random.choice(greetings), user_id)
+        txt = u"Что такое логарифм?"
+        self.send_message(channel_id, txt)
+
+    def write_leave(self, channel_id, user_id):
+        #greetings = ['Hi', 'Hello', 'Nice to meet you', 'Howdy', 'Salutations']
+        #txt = '{}, <@{}>!'.format(random.choice(greetings), user_id)
+        txt = u"<@{0}> так и не узнал что такое логарифм".format(user_id)
+        self.send_message(channel_id, txt)
+
+    def write_join(self, channel_id, user_id):
+        #greetings = ['Hi', 'Hello', 'Nice to meet you', 'Howdy', 'Salutations']
+        #txt = '{}, <@{}>!'.format(random.choice(greetings), user_id)
+        txt = u"<@{0}>, что такое интеграл?".format(user_id)
         self.send_message(channel_id, txt)

     def write_prompt(self, channel_id):
         bot_uid = self.clients.bot_user_id()
         txt = "I'm sorry, I didn't quite understand... Can I help you? (e.g. `<@" + bot_uid + "> help`)"
+        txt = u"Зачем это?"
         self.send_message(channel_id, txt)

     def write_joke(self, channel_id):