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diff --git a/P2/__pycache__/my_parser.cpython-39.pyc b/P2/__pycache__/my_parser.cpython-39.pyc
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diff --git a/P2/app_opener.py b/P2/app_opener.py
new file mode 100644
index 0000000..62ad3b9
--- /dev/null
+++ b/P2/app_opener.py
@@ -0,0 +1,11 @@
+import os
+
+class AppOpener:
+    def open_app(self, app_name):
+        os.system(f'open -a "{app_name}"')
+
+    def close_app(self, app_name):
+        os.system(f'killall "{app_name}"')
+
+    def open_document(self, document_name):
+        os.system(f'open "{document_name}"')
diff --git a/P2/browser_opener.py b/P2/browser_opener.py
new file mode 100644
index 0000000..c783a20
--- /dev/null
+++ b/P2/browser_opener.py
@@ -0,0 +1,5 @@
+import webbrowser
+
+class BrowserOpener:
+    def open_website(self, website_name):
+        webbrowser.open_new_tab(f'https://{website_name}')
diff --git a/P2/main.py b/P2/main.py
new file mode 100644
index 0000000..162d9e8
--- /dev/null
+++ b/P2/main.py
@@ -0,0 +1,15 @@
+from my_parser import Parser
+
+def main():
+    parser = Parser()
+    while True:
+        try:
+            text = input('> ')
+        except EOFError:
+            break
+        if not text:
+            continue
+        parser.parse(text.lower())
+
+if __name__ == '__main__':
+    main()
diff --git a/P2/my_parser.py b/P2/my_parser.py
new file mode 100644
index 0000000..47a9bfc
--- /dev/null
+++ b/P2/my_parser.py
@@ -0,0 +1,53 @@
+from app_opener import AppOpener
+from browser_opener import BrowserOpener
+
+class Parser:
+    def __init__(self):
+        self.app_opener = AppOpener()
+        self.browser_opener = BrowserOpener()
+
+    def parse(self, text):
+        if 'open' in text:
+            if 'program' in text:
+                app_name = self._get_app_name(text)
+                self.app_opener.open_app(app_name)
+            elif 'document' in text:
+                document_name = self._get_document_name(text)
+                self.app_opener.open_document(document_name)
+            elif 'website' in text:
+                website_name = self._get_website_name(text)
+                self.browser_opener.open_website(website_name)
+        elif 'close' in text:
+            if 'program' in text:
+                app_name = self._get_app_name(text)
+                self.app_opener.close_app(app_name)
+
+    def _get_app_name(self, text):
+        app_words = ['open program','close program']
+        return self._get_item_name(text, app_words)
+
+    def _get_document_name(self, text):
+        document_words = ['open document', 'close document']
+        return self._get_item_name(text, document_words)
+
+    def _get_website_name(self, text):
+        website_words = ['open website','close website']
+        return self._get_item_name(text, website_words)
+
+    def _get_item_name(self, text, keywords):
+        index = 0
+        for k in keywords:
+            index = text.find(k)
+            if index != -1:
+                index += len(k)
+        return text[index+1:]
+        # words = text.split()
+        # for i, word in enumerate(words):
+        #     if word in keywords:
+        #         return ' '.join(words[i + 1:])
+        # return ''
+
+
+p = Parser()
+
+print(p._get_item_name('open program firefox',['open program']))
diff --git a/wyklady/3.py b/wyklady/3.py
new file mode 100644
index 0000000..95270d4
--- /dev/null
+++ b/wyklady/3.py
@@ -0,0 +1,171 @@
+# Import lexer and parser from ply module
+import ply.lex as lex
+import ply.yacc as yacc
+
+# List of token types.
+tokens = (
+    'NUMBER',
+    'OPERATE',
+    'SIZE',
+    'KIND',
+    'COLOR',
+    'MATERIAL'
+)
+
+# Token types may be defined as regular expressions, e.g. r'Buy | Sell'
+
+
+def t_OPERATE(t):
+    r'Buy | Sell'
+    return t
+
+
+def t_MATERIAL(t):
+    r'metal | plastic'
+    if t.value == 'metal':
+        t.value = 1
+    elif t.value == 'plastic':
+        t.value = 2
+    return t
+
+
+def t_COLOR(t):
+    r'(black | white | red | green | blue)'
+    if t.value == 'black':
+        t.value = 1
+    elif t.value == 'white':
+        t.value = 2
+    elif t.value == 'red':
+        t.value = 3
+    elif t.value == 'green':
+        t.value = 4
+    elif t.value == 'blue':
+        t.value = 5
+    return t
+
+
+def t_SIZE(t):
+    r'tiny | small | big | large'
+    if t.value == 'tiny':
+        t.value = 1
+    elif t.value == 'small':
+        t.value = 2
+    elif t.value == 'big':
+        t.value = 3
+    elif t.value == 'large':
+        t.value = 4
+    return t
+
+
+def t_KIND(t):
+    r'box(es)? | ring(s)?'
+    if t.value[0] == 'b':
+        t.value = 1
+    else:
+        t.value = 2
+    return t
+
+
+def t_NUMBER(t):
+    r'\d+'
+    t.value = int(t.value)
+    return t
+
+# Lexer error handling rule (Handle words out of vocabulary)
+
+
+def t_error(t):
+    print("Illegal character '%s'" % t.value[0])
+    t.lexer.skip(1)
+
+# Ignore white spaces
+t_ignore = ' \t'
+
+# Main parser rule (command)
+
+
+def p_command(p):
+    'command : OPERATE NUMBER article'
+    index = p[3]
+    # Buy article
+    if p[1] == 'Buy':
+        tab[index] += p[2]
+        print('OK. I am buying ' + str(p[2]) +
+              ' new articles indexed as ' + str(index) + '.')
+        print('No of articles in shop: ' + str(tab[index]))
+    # Sell article
+    elif p[1] == 'Sell':
+        if p[2] > tab[index]:
+            print('I do not have as many articles as you want.')
+        else:
+            tab[index] -= p[2]
+            print('OK. I am selling ' + str(p[2]) +
+                  ' articles indexed as ' + str(index) + '.')
+            print('No of articles in shop: ' + str(tab[index]))
+
+# Parser rule (attribute)
+
+
+def p_attribute_color(p):
+    'attribute : COLOR'
+    p[0] = p[1]
+
+# Parser rule (attribute)
+
+
+def p_attribute_material(p):
+    'attribute : MATERIAL'
+    p[0] = 10 * p[1]
+    
+
+# Parser rule (attribute)
+
+
+def p_attribute_size(p):
+    'attribute : SIZE'
+    p[0] = 100 * p[1]
+
+# Parser rule (article - stop)
+
+
+def p_article_kind(p):
+    'article : KIND'
+    p[0] = 1000 * p[1]
+
+# Parser rule (article - recursion)
+
+
+def p_article_attribute(p):
+    'article : attribute article'
+    p[0] = p[1] + p[2]
+
+# Syntax error handling rule
+
+
+def p_error(p):
+    print("Syntax error in input!")
+
+#######################################
+# Main program
+
+# Initialize table of articles (zero articles at the beginning)
+tab = []
+for index in range(3000):
+    tab.append(0)
+
+# Build the lexer
+lexer = lex.lex()
+
+# Tokenize (short version)
+# for tok in lexer:
+#    print(tok)
+
+# Build the parser
+parser = yacc.yacc()
+
+# Main loop
+while True:
+    s = input('What can I do for you? \n')
+    if s == 'Bye':
+        break
+    parser.parse(s)
diff --git a/wyklady/parser.out b/wyklady/parser.out
new file mode 100644
index 0000000..e871fba
--- /dev/null
+++ b/wyklady/parser.out
@@ -0,0 +1,136 @@
+Created by PLY version 3.11 (http://www.dabeaz.com/ply)
+
+Grammar
+
+Rule 0     S' -> command
+Rule 1     command -> OPERATE NUMBER article
+Rule 2     attribute -> COLOR
+Rule 3     attribute -> MATERIAL
+Rule 4     attribute -> SIZE
+Rule 5     article -> KIND
+Rule 6     article -> attribute article
+
+Terminals, with rules where they appear
+
+COLOR                : 2
+KIND                 : 5
+MATERIAL             : 3
+NUMBER               : 1
+OPERATE              : 1
+SIZE                 : 4
+error                : 
+
+Nonterminals, with rules where they appear
+
+article              : 1 6
+attribute            : 6
+command              : 0
+
+Parsing method: LALR
+
+state 0
+
+    (0) S' -> . command
+    (1) command -> . OPERATE NUMBER article
+
+    OPERATE         shift and go to state 2
+
+    command                        shift and go to state 1
+
+state 1
+
+    (0) S' -> command .
+
+
+
+state 2
+
+    (1) command -> OPERATE . NUMBER article
+
+    NUMBER          shift and go to state 3
+
+
+state 3
+
+    (1) command -> OPERATE NUMBER . article
+    (5) article -> . KIND
+    (6) article -> . attribute article
+    (2) attribute -> . COLOR
+    (3) attribute -> . MATERIAL
+    (4) attribute -> . SIZE
+
+    KIND            shift and go to state 5
+    COLOR           shift and go to state 7
+    MATERIAL        shift and go to state 8
+    SIZE            shift and go to state 9
+
+    article                        shift and go to state 4
+    attribute                      shift and go to state 6
+
+state 4
+
+    (1) command -> OPERATE NUMBER article .
+
+    $end            reduce using rule 1 (command -> OPERATE NUMBER article .)
+
+
+state 5
+
+    (5) article -> KIND .
+
+    $end            reduce using rule 5 (article -> KIND .)
+
+
+state 6
+
+    (6) article -> attribute . article
+    (5) article -> . KIND
+    (6) article -> . attribute article
+    (2) attribute -> . COLOR
+    (3) attribute -> . MATERIAL
+    (4) attribute -> . SIZE
+
+    KIND            shift and go to state 5
+    COLOR           shift and go to state 7
+    MATERIAL        shift and go to state 8
+    SIZE            shift and go to state 9
+
+    attribute                      shift and go to state 6
+    article                        shift and go to state 10
+
+state 7
+
+    (2) attribute -> COLOR .
+
+    KIND            reduce using rule 2 (attribute -> COLOR .)
+    COLOR           reduce using rule 2 (attribute -> COLOR .)
+    MATERIAL        reduce using rule 2 (attribute -> COLOR .)
+    SIZE            reduce using rule 2 (attribute -> COLOR .)
+
+
+state 8
+
+    (3) attribute -> MATERIAL .
+
+    KIND            reduce using rule 3 (attribute -> MATERIAL .)
+    COLOR           reduce using rule 3 (attribute -> MATERIAL .)
+    MATERIAL        reduce using rule 3 (attribute -> MATERIAL .)
+    SIZE            reduce using rule 3 (attribute -> MATERIAL .)
+
+
+state 9
+
+    (4) attribute -> SIZE .
+
+    KIND            reduce using rule 4 (attribute -> SIZE .)
+    COLOR           reduce using rule 4 (attribute -> SIZE .)
+    MATERIAL        reduce using rule 4 (attribute -> SIZE .)
+    SIZE            reduce using rule 4 (attribute -> SIZE .)
+
+
+state 10
+
+    (6) article -> attribute article .
+
+    $end            reduce using rule 6 (article -> attribute article .)
+
diff --git a/wyklady/parsetab.py b/wyklady/parsetab.py
new file mode 100644
index 0000000..1df067c
--- /dev/null
+++ b/wyklady/parsetab.py
@@ -0,0 +1,36 @@
+
+# parsetab.py
+# This file is automatically generated. Do not edit.
+# pylint: disable=W,C,R
+_tabversion = '3.10'
+
+_lr_method = 'LALR'
+
+_lr_signature = 'COLOR KIND MATERIAL NUMBER OPERATE SIZEcommand : OPERATE NUMBER articleattribute : COLORattribute : MATERIALattribute : SIZEarticle : KINDarticle : attribute article'
+    
+_lr_action_items = {'OPERATE':([0,],[2,]),'$end':([1,4,5,10,],[0,-1,-5,-6,]),'NUMBER':([2,],[3,]),'KIND':([3,6,7,8,9,],[5,5,-2,-3,-4,]),'COLOR':([3,6,7,8,9,],[7,7,-2,-3,-4,]),'MATERIAL':([3,6,7,8,9,],[8,8,-2,-3,-4,]),'SIZE':([3,6,7,8,9,],[9,9,-2,-3,-4,]),}
+
+_lr_action = {}
+for _k, _v in _lr_action_items.items():
+   for _x,_y in zip(_v[0],_v[1]):
+      if not _x in _lr_action:  _lr_action[_x] = {}
+      _lr_action[_x][_k] = _y
+del _lr_action_items
+
+_lr_goto_items = {'command':([0,],[1,]),'article':([3,6,],[4,10,]),'attribute':([3,6,],[6,6,]),}
+
+_lr_goto = {}
+for _k, _v in _lr_goto_items.items():
+   for _x, _y in zip(_v[0], _v[1]):
+       if not _x in _lr_goto: _lr_goto[_x] = {}
+       _lr_goto[_x][_k] = _y
+del _lr_goto_items
+_lr_productions = [
+  ("S' -> command","S'",1,None,None,None),
+  ('command -> OPERATE NUMBER article','command',3,'p_command','3.py',88),
+  ('attribute -> COLOR','attribute',1,'p_attribute_color','3.py',110),
+  ('attribute -> MATERIAL','attribute',1,'p_attribute_material','3.py',117),
+  ('attribute -> SIZE','attribute',1,'p_attribute_size','3.py',124),
+  ('article -> KIND','article',1,'p_article_kind','3.py',131),
+  ('article -> attribute article','article',2,'p_article_attribute','3.py',138),
+]