diff --git a/Answers/40131712053/src/Main.java b/Answers/40131712053/src/Main.java
new file mode 100644
index 0000000..e705846
--- /dev/null
+++ b/Answers/40131712053/src/Main.java
@@ -0,0 +1,217 @@
+import java.util.ArrayList;
+import java.util.Scanner;
+
+public class Main {
+    private static final Scanner scanner=new Scanner(System.in);
+    private static final int SHIFT_VALUE = 3;
+    private static String encodedFullName;
+    private static String encodedPhoneNumber;
+    private static String encodedInterests;
+    private static String encodedUserID;
+
+
+    public static void main(String[] args) {
+        setInitialData();
+        String input;
+        while (true){
+            System.out.println("1-set full name\n2-set phone number\n3-set user ID\n4-set interests\n5-view user information\n6-view encoded user information\n7-exit");
+            input=scanner.nextLine();
+            if (input.equals("1")){
+                String fullName =fullName();
+                encodedFullName=informationEncoder(fullName,SHIFT_VALUE);
+
+            }else if (input.equals("2")){
+                String phoneNumber=phoneNumber();
+                encodedPhoneNumber=informationEncoder(phoneNumber,SHIFT_VALUE);
+
+            }else if (input.equals("3")){
+                String userID=userId();
+                encodedUserID=informationEncoder(userID,SHIFT_VALUE);
+
+            }else if (input.equals("4")){
+                ArrayList<String> interests=getInterests();
+                StringBuilder interest_String = new StringBuilder();
+                for(int i = 1; i <= interests.size(); i++){
+                    interest_String.append(i).append(". ");
+                    interest_String.append(interests.get(i-1)).append("\n");
+                }
+                encodedInterests=informationEncoder(interest_String.toString(),SHIFT_VALUE);
+
+            }else if (input.equals("5")){
+                String decodedFullName=informationDecoder(encodedFullName,SHIFT_VALUE);
+                String decodedPhoneNumber=informationDecoder(encodedPhoneNumber,SHIFT_VALUE);
+                String decodedUserID=informationDecoder(encodedUserID,SHIFT_VALUE);
+                String decodedInterests=informationDecoder(encodedInterests,SHIFT_VALUE);
+                String userInformation=userFullInformation(decodedFullName,decodedPhoneNumber,decodedUserID,decodedInterests);
+                System.out.println(userInformation);
+
+
+            }else if (input.equals("6")){
+                System.out.println("encoded full name: " + encodedFullName);
+                System.out.println("encoded phone number: " + encodedPhoneNumber);
+                System.out.println("encoded userID: " + encodedUserID);
+                System.out.println("encoded interests:\n" + encodedInterests);
+
+            }else if (input.equals("7")){
+                System.out.println("Good luck!" );
+                break;
+
+            }else {
+                System.out.println("Invalid input");
+            }
+
+        }
+
+    }
+
+    public static void setInitialData(){
+        encodedFullName=informationEncoder("(not provided yet)",SHIFT_VALUE);
+        encodedPhoneNumber=informationEncoder("(not provided yet)",SHIFT_VALUE);
+        encodedUserID=informationEncoder("(not provided yet)",SHIFT_VALUE);
+        encodedInterests=informationEncoder("(not provided yet)",SHIFT_VALUE);
+    }
+
+    public static String fullName(){
+        String firstName="";
+        String lastName="";
+        System.out.println("first name:");
+        while (firstName.equals("")){
+            firstName=scanner.nextLine();
+        }
+        System.out.println("last name:");
+        while (lastName.equals("")){
+            lastName=scanner.nextLine();
+        }
+
+        return firstName + " " + lastName;
+    }
+
+    public static String phoneNumber(){
+        System.out.println("Phone Number:");
+        String phone="wrong";
+        while (phone.equals("wrong")){
+            phone=scanner.nextLine();
+            boolean isAllDigits = true;
+            for (int i = 0; i < phone.length(); i++) {
+                if (!Character.isDigit(phone.charAt(i))) {
+                    isAllDigits = false;
+                    break;
+                }
+            }
+            if (!isAllDigits) {
+                System.out.println("please enter only digits");
+                phone= "wrong";
+            } else if(phone.length() !=10){
+                System.out.println("please enter 10 digits");
+                phone= "wrong";
+            } else if(phone.charAt(0)!='9'){
+                System.out.println("the first digit must be 9");
+                phone= "wrong";
+            }
+        }
+        return "0"+phone;
+    }
+
+    public static String userId(){
+        String id="wrong";
+        System.out.println("user ID:");
+        while (id.equals("wrong")){
+            id=scanner.nextLine();
+            boolean isAllDigits = true;
+            for (int i = 0; i < id.length(); i++) {
+                if (!Character.isDigit(id.charAt(i))) {
+                    isAllDigits = false;
+                    break;
+                }
+            }
+            if (!isAllDigits) {
+                System.out.println("please enter only digits");
+                id= "wrong";
+            }
+            if(id.length()<4 || id.length()>13){
+                System.out.println("id length must be between 4 and 13");
+                id= "wrong";
+            }
+        }
+        return id;
+    }
+
+    public static ArrayList<String> getInterests(){
+        System.out.println("enter 0 while you are done");
+        ArrayList<String> interests = new ArrayList<>();
+        while (interests.size()<10){
+            int interest_number=interests.size()+1;
+            System.out.println("interest "+interest_number + ":");
+            String interest=scanner.nextLine();
+            if(interest.equals("")){
+                continue;
+            }else if(interest.equals("0")){
+                if(interests.size()==0){
+                    System.out.println("you have to enter at least one interest");
+                    continue;
+                }else {
+                    break;
+                }
+
+            }else {
+                interests.add(interest);
+            }
+
+        }
+        return interests;
+    }
+
+    public static String userFullInformation(String fullName,String phoneNumber,String userID,String interests) {
+        StringBuilder fullInformation = new StringBuilder();
+        fullInformation.append("Hello! My name is ").append(fullName).append(". My ID is ").append(userID).append(". Here are some of my interests:\n");
+        fullInformation.append(interests);
+        fullInformation.append("\n");
+        fullInformation.append("You can reach me via my phone number ").append(phoneNumber).append(".\n");
+        return fullInformation.toString();
+    }
+
+    public static String informationEncoder(String information, int shift) {
+        StringBuilder encodedInformation = new StringBuilder();
+
+        for (int i = 0; i < information.length(); i++) {
+            char currentChar = information.charAt(i);
+
+            if (Character.isUpperCase(currentChar)) {
+                char encodedChar = (char) (((currentChar - 'A' + shift) % 26) + 'A');
+                encodedInformation.append(encodedChar);
+            }
+            else if (Character.isLowerCase(currentChar)) {
+                char encodedChar = (char) (((currentChar - 'a' + shift) % 26) + 'a');
+                encodedInformation.append(encodedChar);
+            }
+            else {
+                encodedInformation.append(currentChar);
+            }
+        }
+
+        return encodedInformation.toString();
+    }
+
+    public static String informationDecoder(String encodedInformation, int shift) {
+        StringBuilder decodedInformation = new StringBuilder();
+
+        for (int i = 0; i < encodedInformation.length(); i++) {
+            char currentChar = encodedInformation.charAt(i);
+
+            if (Character.isUpperCase(currentChar)) {
+                char decodedChar = (char) (((currentChar - 'A' - shift + 26) % 26) + 'A');
+                decodedInformation.append(decodedChar);
+            }
+            else if (Character.isLowerCase(currentChar)) {
+                char decodedChar = (char) (((currentChar - 'a' - shift + 26) % 26) + 'a');
+                decodedInformation.append(decodedChar);
+            }
+            else {
+                decodedInformation.append(currentChar);
+            }
+        }
+
+        return decodedInformation.toString();
+    }
+
+}
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