diff --git a/Zadanie-03/.idea/workspace.xml b/Zadanie-03/.idea/workspace.xml
index 65c30df..87282a7 100644
--- a/Zadanie-03/.idea/workspace.xml
+++ b/Zadanie-03/.idea/workspace.xml
@@ -1,14 +1,8 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
   <component name="ChangeListManager">
-    <list default="true" id="5f8a3521-157f-4adb-a0ab-dc99bbf14aa0" name="Default" comment="small code refactor">
-      <change afterPath="$PROJECT_DIR$/.idea/description.html" afterDir="false" />
-      <change afterPath="$PROJECT_DIR$/.idea/misc.xml" afterDir="false" />
-      <change afterPath="$PROJECT_DIR$/.idea/modules.xml" afterDir="false" />
-      <change afterPath="$PROJECT_DIR$/.idea/project-template.xml" afterDir="false" />
-      <change afterPath="$PROJECT_DIR$/.idea/workspace.xml" afterDir="false" />
-      <change afterPath="$PROJECT_DIR$/out/production/Zadanie-03/com/tylkowski/crc/CrcTask.class" afterDir="false" />
-      <change afterPath="$PROJECT_DIR$/out/production/Zadanie-03/com/tylkowski/crc/Main.class" afterDir="false" />
+    <list default="true" id="5f8a3521-157f-4adb-a0ab-dc99bbf14aa0" name="Default" comment="">
+      <change beforePath="$PROJECT_DIR$/.idea/workspace.xml" beforeDir="false" afterPath="$PROJECT_DIR$/.idea/workspace.xml" afterDir="false" />
       <change beforePath="$PROJECT_DIR$/src/com/tylkowski/crc/CrcTask.java" beforeDir="false" afterPath="$PROJECT_DIR$/src/com/tylkowski/crc/CrcTask.java" afterDir="false" />
       <change beforePath="$PROJECT_DIR$/src/com/tylkowski/crc/Main.java" beforeDir="false" afterPath="$PROJECT_DIR$/src/com/tylkowski/crc/Main.java" afterDir="false" />
     </list>
@@ -25,8 +19,8 @@
       <file leaf-file-name="Main.java" pinned="false" current-in-tab="true">
         <entry file="file://$PROJECT_DIR$/src/com/tylkowski/crc/Main.java">
           <provider selected="true" editor-type-id="text-editor">
-            <state relative-caret-position="238">
-              <caret line="14" column="57" selection-start-line="14" selection-start-column="51" selection-end-line="14" selection-end-column="57" />
+            <state relative-caret-position="255">
+              <caret line="15" column="9" lean-forward="true" selection-start-line="15" selection-start-column="9" selection-end-line="15" selection-end-column="9" />
             </state>
           </provider>
         </entry>
@@ -34,8 +28,8 @@
       <file leaf-file-name="CrcTask.java" pinned="false" current-in-tab="false">
         <entry file="file://$PROJECT_DIR$/src/com/tylkowski/crc/CrcTask.java">
           <provider selected="true" editor-type-id="text-editor">
-            <state relative-caret-position="102">
-              <caret line="13" column="22" selection-start-line="13" selection-start-column="22" selection-end-line="13" selection-end-column="22" />
+            <state relative-caret-position="178">
+              <caret line="44" column="9" lean-forward="true" selection-start-line="44" selection-start-column="9" selection-end-line="44" selection-end-column="9" />
               <folding>
                 <element signature="imports" expanded="true" />
               </folding>
@@ -66,6 +60,9 @@
       <find>chunk</find>
       <find>toBin</find>
       <find>toBinaryStr</find>
+      <find>swap</find>
+      <find>letter</find>
+      <find>lol</find>
     </findStrings>
   </component>
   <component name="Git.Settings">
@@ -74,8 +71,8 @@
   <component name="IdeDocumentHistory">
     <option name="CHANGED_PATHS">
       <list>
-        <option value="$PROJECT_DIR$/src/com/tylkowski/crc/CrcTask.java" />
         <option value="$PROJECT_DIR$/src/com/tylkowski/crc/Main.java" />
+        <option value="$PROJECT_DIR$/src/com/tylkowski/crc/CrcTask.java" />
       </list>
     </option>
   </component>
@@ -96,6 +93,8 @@
       <foldersAlwaysOnTop value="true" />
     </navigator>
     <panes>
+      <pane id="PackagesPane" />
+      <pane id="AndroidView" />
       <pane id="ProjectPane">
         <subPane>
           <expand>
@@ -118,9 +117,7 @@
           <select />
         </subPane>
       </pane>
-      <pane id="AndroidView" />
       <pane id="Scope" />
-      <pane id="PackagesPane" />
     </panes>
   </component>
   <component name="PropertiesComponent">
@@ -144,8 +141,7 @@
     <configuration name="Main" type="Application" factoryName="Application" temporary="true">
       <option name="MAIN_CLASS_NAME" value="com.tylkowski.crc.Main" />
       <module name="Zadanie-03" />
-      <option name="PROGRAM_PARAMETERS" value="&quot;1&quot; &quot;a&quot;" />
-      <option name="VM_PARAMETERS" value="-Dfile.encoding=latin-1" />
+      <option name="PROGRAM_PARAMETERS" value="&quot;2&quot; &quot;b­&quot;" />
       <option name="WORKING_DIRECTORY" value="file://$PROJECT_DIR$" />
       <RunnerSettings RunnerId="Run" />
       <ConfigurationWrapper RunnerId="Run" />
@@ -187,7 +183,8 @@
       <workItem from="1529407679397" duration="19000" />
       <workItem from="1529409635196" duration="1437000" />
       <workItem from="1529428699866" duration="20522000" />
-      <workItem from="1529482084631" duration="5516000" />
+      <workItem from="1529482084631" duration="5831000" />
+      <workItem from="1529497353540" duration="2850000" />
     </task>
     <task id="LOCAL-00001" summary="project started">
       <created>1529359475020</created>
@@ -224,11 +221,18 @@
       <option name="project" value="LOCAL" />
       <updated>1529450003665</updated>
     </task>
-    <option name="localTasksCounter" value="6" />
+    <task id="LOCAL-00006" summary="charset update">
+      <created>1529487959831</created>
+      <option name="number" value="00006" />
+      <option name="presentableId" value="LOCAL-00006" />
+      <option name="project" value="LOCAL" />
+      <updated>1529487959831</updated>
+    </task>
+    <option name="localTasksCounter" value="7" />
     <servers />
   </component>
   <component name="TimeTrackingManager">
-    <option name="totallyTimeSpent" value="41722000" />
+    <option name="totallyTimeSpent" value="44887000" />
   </component>
   <component name="ToolWindowManager">
     <frame x="-8" y="-8" width="1382" height="744" extended-state="6" />
@@ -244,11 +248,11 @@
       <window_info anchor="right" id="Maven Projects" order="3" />
       <window_info anchor="bottom" id="Database Changes" order="7" show_stripe_button="false" />
       <window_info anchor="bottom" id="Version Control" order="7" />
-      <window_info active="true" anchor="bottom" id="Run" order="2" visible="true" weight="0.43069306" />
+      <window_info anchor="bottom" id="Run" order="2" weight="0.38118812" />
       <window_info anchor="bottom" id="Terminal" order="7" />
       <window_info id="Capture Tool" order="2" />
       <window_info id="Designer" order="2" />
-      <window_info content_ui="combo" id="Project" order="0" visible="true" weight="0.16414523" />
+      <window_info content_ui="combo" id="Project" order="0" visible="true" weight="0.16641453" />
       <window_info anchor="right" id="Database" order="3" />
       <window_info id="Structure" order="1" side_tool="true" weight="0.25" />
       <window_info anchor="right" id="Ant Build" order="1" weight="0.25" />
@@ -276,9 +280,27 @@
     <MESSAGE value="encode added!" />
     <MESSAGE value="decode added!" />
     <MESSAGE value="small code refactor" />
-    <option name="LAST_COMMIT_MESSAGE" value="small code refactor" />
+    <MESSAGE value="charset update" />
+    <option name="LAST_COMMIT_MESSAGE" value="charset update" />
   </component>
   <component name="editorHistoryManager">
+    <entry file="file://$PROJECT_DIR$/src/com/tylkowski/crc/Main.java">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="374">
+          <caret line="22" lean-forward="true" selection-start-line="22" selection-end-line="22" />
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/src/com/tylkowski/crc/CrcTask.java">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="2856">
+          <caret line="170" selection-start-line="170" selection-end-line="170" selection-end-column="50" />
+          <folding>
+            <element signature="imports" expanded="true" />
+          </folding>
+        </state>
+      </provider>
+    </entry>
     <entry file="file://$PROJECT_DIR$/src/com/tylkowski/crc/Main.java">
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="204">
@@ -366,10 +388,24 @@
         </state>
       </provider>
     </entry>
+    <entry file="jar://C:/Program Files/Java/jdk1.8.0_77/src.zip!/java/lang/System.java">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="329">
+          <caret line="494" column="24" selection-start-line="494" selection-start-column="24" selection-end-line="494" selection-end-column="24" />
+        </state>
+      </provider>
+    </entry>
+    <entry file="jar://C:/Program Files/Java/jdk1.8.0_77/src.zip!/java/util/Arrays.java">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="278">
+          <caret line="3556" column="19" selection-start-line="3556" selection-start-column="19" selection-end-line="3556" selection-end-column="19" />
+        </state>
+      </provider>
+    </entry>
     <entry file="file://$PROJECT_DIR$/src/com/tylkowski/crc/CrcTask.java">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="102">
-          <caret line="13" column="22" selection-start-line="13" selection-start-column="22" selection-end-line="13" selection-end-column="22" />
+        <state relative-caret-position="178">
+          <caret line="44" column="9" lean-forward="true" selection-start-line="44" selection-start-column="9" selection-end-line="44" selection-end-column="9" />
           <folding>
             <element signature="imports" expanded="true" />
           </folding>
@@ -378,8 +414,8 @@
     </entry>
     <entry file="file://$PROJECT_DIR$/src/com/tylkowski/crc/Main.java">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="238">
-          <caret line="14" column="57" selection-start-line="14" selection-start-column="51" selection-end-line="14" selection-end-column="57" />
+        <state relative-caret-position="255">
+          <caret line="15" column="9" lean-forward="true" selection-start-line="15" selection-start-column="9" selection-end-line="15" selection-end-column="9" />
         </state>
       </provider>
     </entry>
diff --git a/Zadanie-03/src/com/tylkowski/crc/CrcTask.java b/Zadanie-03/src/com/tylkowski/crc/CrcTask.java
index 74a3099..eb9a506 100644
--- a/Zadanie-03/src/com/tylkowski/crc/CrcTask.java
+++ b/Zadanie-03/src/com/tylkowski/crc/CrcTask.java
@@ -18,10 +18,10 @@ class CrcTask {
     }
 
     private void setEncoding() throws NoSuchFieldException, IllegalAccessException {
-        System.setProperty("file.encoding","ISO-8859-1");
+        System.setProperty("file.encoding", "ISO-8859-1");
         Field charset = Charset.class.getDeclaredField("defaultCharset");
         charset.setAccessible(true);
-        charset.set(null,null);
+        charset.set(null, null);
     }
 
     private String formatMessage(String message) {
@@ -65,8 +65,6 @@ class CrcTask {
                 remainder = removeUnecessaryZeros(remainder);
                 messageAsShortArray = createMessageFromRemainderAndPartFromOldMessage(remainder, messageAsShortArray);
             }
-
-
         }
 
     }
@@ -111,7 +109,6 @@ class CrcTask {
     private char getCharFromShortArray(short[] piece, int from, int to) {
         short[] sign = Arrays.copyOfRange(piece, from, to);
         int character = Integer.parseInt(shortArrayToBinaryString(sign), 2);
-//        System.out.println(character);
         return (char) character;
     }
 
@@ -165,30 +162,23 @@ class CrcTask {
     }
 
     private String letterToBinaryString(char letter) {
-//        System.out.println("lt: " + letter + " " + (int) letter);
         int a = (int) letter;
-//        if (a == 63) a = 157;
-        System.out.println("letter in int: " + a);
-
         StringBuilder binaryString = new StringBuilder(Integer.toBinaryString(a));
-
         while (binaryString.length() % 8 != 0) {
             binaryString.insert(0, "0");
         }
-//        System.out.println("bs" + binaryString.toString());
         return binaryString.toString();
     }
 
     boolean decode(String encodedString) {
         encodedString = toBinaryString(encodedString);
-        encodedString = fillPolyTo8(encodedString);
+        encodedString = fillPoly(encodedString);
         short[] encodedShortArray = convertBinaryStringToShortArray(encodedString);
         encodedShortArray = swapPolynomialValues(encodedShortArray);
         while (true) {
             if (!shortArrayContains(encodedShortArray, 1)) {
                 return true;
             }
-
             if (encodedShortArray[0] == 0) {
                 encodedShortArray = Arrays.copyOfRange(encodedShortArray, 1, encodedShortArray.length);
             } else {
@@ -208,7 +198,6 @@ class CrcTask {
         StringBuilder stringBuilder = new StringBuilder();
         for (int i = 0; i < encodedString.length(); i++) {
             stringBuilder.append(letterToBinaryString(encodedString.charAt(i)));
-
         }
         return stringBuilder.toString();
     }
@@ -222,7 +211,7 @@ class CrcTask {
         return false;
     }
 
-    private String fillPolyTo8(String encodedString) {
+    private String fillPoly(String encodedString) {
         StringBuilder stringBuilder = new StringBuilder(encodedString);
         while (stringBuilder.length() % 8 != 0) {
             stringBuilder.insert(0, "0");
diff --git a/Zadanie-03/src/com/tylkowski/crc/Main.java b/Zadanie-03/src/com/tylkowski/crc/Main.java
index 1ef0595..b85f350 100644
--- a/Zadanie-03/src/com/tylkowski/crc/Main.java
+++ b/Zadanie-03/src/com/tylkowski/crc/Main.java
@@ -3,10 +3,10 @@ package com.tylkowski.crc;
 public class Main {
 
     public static void main(String[] args) throws NoSuchFieldException, IllegalAccessException {
-        // use valid character encoding ISO-8859-1
-        // in command line type "1" for mode and "a" for message
-        //example "1" "a" -> this will encode string "a" and return FCS
-        // example "2" "abc" -> this will decode string "abc" and return true if it is valid or false if not
+        // in command line type "1" for mode and "b" for message
+        // example "1" "b" -> this will encode string "b" and return FCS
+        // example "2" "bXY" -> this will decode string "bXY" and return true if it is valid or false if not
+        // X and Y - 1 and 2 character of FCS
         CrcTask crcTask = new CrcTask(args[1], args[1]);
         if(args[0].equals("1")) {
             //create FCS