diff --git a/0-0-intro/src/main/java/com/bobocode/intro/ExerciseIntroduction.java b/0-0-intro/src/main/java/com/bobocode/intro/ExerciseIntroduction.java
index 35d925636..a022e2553 100644
--- a/0-0-intro/src/main/java/com/bobocode/intro/ExerciseIntroduction.java
+++ b/0-0-intro/src/main/java/com/bobocode/intro/ExerciseIntroduction.java
@@ -2,44 +2,14 @@
 
 import com.bobocode.util.ExerciseNotCompletedException;
 
-/**
- * Welcome! This is an introduction exercise that will show you a simple example of Bobocode exercises.
- * <p>
- * JavaDoc is a way of communication with other devs. We use Java Docs in every exercise to define the task.
- * So PLEASE MAKE SURE you read the Java Docs carefully.
- * <p>
- * Every exercise is covered with tests, see {@link ExerciseIntroductionTest}.
- * <p>
- * In this repo you'll find dozens of exercises covering various fundamental topics.
- * They all have the same structure helping you to focus on practice and build strong skills!
- *
- * @author Taras Boychuk
- */
+
 public class ExerciseIntroduction {
-    /**
-     * This method returns a very important message. If understood well, it can save you years of inefficient learning,
-     * and unlock your potential!
-     *
-     * @return "The key to efficient learning is practice!"
-     */
+
     public String getWelcomeMessage() {
-        // todo: implement a method and return a message according to javadoc
-        throw new ExerciseNotCompletedException(); 
+        return "The key to efficient learning is practice!";
     }
 
-    /**
-     * Method encodeMessage accepts one {@link String} parameter and returns encoded {@link String}.
-     * <p>
-     * PLEASE NOTE THAT YOU WILL GET STUCK ON THIS METHOD INTENTIONALLY! ;)
-     * <p>
-     * Every exercise has a completed solution that is stored in the branch "completed". So in case you got stuck
-     * and don't know what to do, go check out completed solution.
-     *
-     * @param message input message
-     * @return encoded message
-     */
     public String encodeMessage(String message) {
-        // todo: switch to branch "completed" in order to see how it should be implemented
-        throw new ExerciseNotCompletedException();
+        return Base64.getEncoder().encodeToString(message.getBytes());
     }
 }