diff --git a/example_nlu.py b/example_nlu.py
index f16e5bb..a505d5c 100644
--- a/example_nlu.py
+++ b/example_nlu.py
@@ -4,7 +4,7 @@ import os
 
 __location__ = Path().resolve()
 
-book_grammar = jsgf.parse_grammar_file(os.path.join(__location__, "grammar1.jsgf"))
+book_grammar = jsgf.parse_grammar_file(os.path.join(__location__, "grammar3.jsgf"))
 book_grammar
 
 
@@ -35,10 +35,10 @@ def nlu(utterance):
 
 
 
-utterance = 'Cześć dodaj ser'
+utterance = 'kup dwie baterie'
 matched = book_grammar.find_matching_rules(utterance)
 matched
 
-nlu('Cześć dodaj ser')
+nlu('kup dwie baterie')
 
 get_dialog_act(matched[0])
\ No newline at end of file
diff --git a/grammar3.jsgf b/grammar3.jsgf
index 5230d8a..9a5fba0 100644
--- a/grammar3.jsgf
+++ b/grammar3.jsgf
@@ -1,6 +1,4 @@
-#JSGF V1.0;
-grammar zakupyOnline;
-@charset "UTF-8";
+#JSGF V1.0 UTF-8;
 
 grammar zakupyOnline;
 
@@ -32,7 +30,7 @@ public <command> = <buyCommand> | <cartCommand> | <filterCommand> | <searchComma
 
 <filterCommand> = filtruj według <filterType>;
 
-<filterType> = (ceny rosnącą | ceny malejąco | marka <brandName> | kolor <colorName> | rozmiar <sizeType> | ranking <ratingType> | dostępność);
+<filterType> = (ceny rosnąco | ceny malejąco | dostępność | marka <brandName> | kolor <colorName> | rozmiar <sizeType> | ranking <ratingType>);
 
 <brandName> = (Coca-Cola | Pepsi | Dr. Pepper | Tiger | Milka | L'Oreal | Procter & Gamble | Samsung | Apple | Sony);